Tag Archives: coastal habitat

Losing Beaches, Losing Places

We have long considered man’s impact on the world, but are only starting to be able to chart the vastness of the scope of anthropogenic change. And wen it comes to the contraction of shores and beaches that has been forecast in current climate scenarios, the oldest of human environments, the shoreline and coast, seems in danger of drastic reduction at a scale we have rarely considered. The shifting littoral landscapse of the world have ben long neglected, if they are turned to each Earth Day for coastal cleanups and have been the site of intense preoccupations as a result of sea-level rise, as we have protected much of our national seashore.

National Seashore (National Park Service)

But the prospect of an accelerated global erosion of coastal landscapes, and the loss of beaches, have only begun to be processed as triggering cascading consequences from disturbing ecological niches and coastal economies to the human relation to the natural world–a new relation to global ecology that we may well lack the vocabulary and structures to map on adequate scale to process, let alone discuss.

But the mapping of coastal retreat that is projected for the coming century charts the magnitude of the scale of impact of human-created modification of a global environment in NOAA’s Fluid Dynamics Project calls for a broader reckoning of the impact on the global environment that stands to be created by coastal retreat akin to a global pandemic like SARS-CoV-2, and a remapping of the global shorelines that we have a very limited chance to come to terms with in any active context; terms like East and West don’t work in a climate catastrophe that does not differentiate not only nation states but that we lack the narrative categories to come to terms with in terms of economic inequalities, but suggest a crisis of global proportions that contrast with the delicate organization of space on shorelines near our home in their brute redrawing of the increasingly impermanent sandy shore projected for 2100, according to a rather modest climate change scenario.

The discovery of margin of the shoreline in the middle of the twentieth century as a privileged site of intense biodiversity risks obliteration as a particularly fragile ecosystem. Yet the shoreline habitat is now a site of unprecedented vulnerability. (The same stretch of sensitive shoreline habitat was quickly closed to comply with shelter-at-place directive, given the range of urban residents who drove to flood its trails, beaches, and shoreline as a way to find balance, many standing transfixed before the waves in a particularly stressful time, seeking purchase on a moment few could really grasp.)

McClures Beach, Inverness CA

The seashore seemed a natural place of reflection. But it was hard to imagine the sensitivity of these littoral lands. While the national seashore at Point Reyes is a unique preserved coastal environment, where eroding cliffs meet sands along broad strips of beach whose low grade offers habitat to coastal birds, grasses, and shellfish, in a meeting point of fresh and salt water, the beauty of the coast seemed a perfect refuge in a time of disorientation.

This blog has long discussed the specter of anthropogenic change, but in the panic of COVID-19, it seemed clear that we lack the mode to talk about the scale, continuities, and complexity at which such world-changing processes will occur. The future loss of shores would be quite difficult to imagine, even if one stares at the remote sensing maps that predict the effects of sea-level rise.. So many had voyaged to the shores as if by instinct during the COVID-19 coronavirus outbreak in 2020, from Long Island to Marin, to the extent of disturbing many coastal residents, who read searching for break from anxiety by acts of coastal distancing as an unwelcome promotion of the danger of importing viral spread.

In England and elsewhere, many departed from the city, in search of a new environment, by traveling to the coasts–where they were greeted, similarly, by protests by those who saw their arrival as a harbinger of infection. Many public beaches, concerned about close contact, have outright closed, as coastal communities do their best to dissuade visitors seeking to escape infection in Hawaii, Moab, Alabama, North Carolina or the Gulf Coast–in ways that cut us off from the shore as a place of reflection and rumination.

If undue media attention may be directed to bemoaning college students on Florida Spring Break, we must remember that Florida’s Governor, Ron DeSantis, ostensibly encharged with securing the state’s well-being and public welfare, stubbornly insisted on keeping beaches open in the state the shore until Easter, to allow “students to party” on Miami Beach, Fort Lauderdale, Clearwater Beach, and other “hotspots” of pleasure into hot spots of viral infection: DeSantis, never one to stop claiming higher ground, hypocritically or not, only turned his wrath on the partiers after facing a lawsuit from the state Attorney General, and even as communities closed beaches, refused to shutter state beaches to limit the spread of the Coronavirus that were a vital parts of the state’s economy–reluctant to close them until local municipalities intervened.

John Raedle/Getty Images

Shifting the blame to foreign travelers–and insisting on self-quarantining visitors from New York state or New Jersey–he sought to keep them open for business, by casting them as more vital than viral. DeSantis refused to accept the national scope of the problem, defending an economy that depended on tourism, elevating the economy over national health–and keeping them open a week after the closure of Disney World, after trying to keep a “six feet distance rule” to “stop large crowds from congregating,” as if the crowding was an issue, more than human proximity and contact–and refusing to take leadership on the issue by “deferring” to local government and causing confusion.

As fhe Florida Governor reflected on the large number of elders in the state population, and their potential hindering of his own chances for re-election, it seems, did he alter his stance entirely, and beg the President to declare a national emergency, as the spread of the virus led to thousands of layoffs, with all non-essential businesses closed in coastal communities, as De Santis issued a state of emergency March 9, 2020.

Initial Florida Sites of Coronavirus Outbreaks of COVID-19 Infections/March 9, 2020

Meanwhile the COVID-19 data timeline by mid-March had spread across Central Florida, with cases of infection clustering on the shores. While the map that sizes the isolated pathogen as its symbol of COVID spread seems freakish, the telling newspaper graphic captures well the problem of coming to terms with the transmission of infections along the beach–superimposing the specter of an overlay of the COVID-19 pathogen as if colonizing or as blossoming along Floridian shores.

Orlando Sentinel

The abandonment of the closed Miami Beach–one of several citie that refused to keep its beaches open, as infection spread, as they knew what was really best for them–seemed to confirm the shore’s status as a natural site of reflection. The scope of projected reconfiguration of future shorelines would effect a deep change in the human relation to the shoreline, as much as the shoreline as a site of shelter and habitat.

Joe Raedle/Getty Images

For environmental geographer Clarence Glacken, the “traces on the Rhodian shore” were signs of civilization and the human modification of the environment that were fundamental to historical processes of change. The reference of the title of his survey of the modification of land through the industrial revolution took its reference point as antiquity–the image of the philosopher taking geometric figures drawn on the shores of Rhodes where he was shipwrecked as evidence of human habitation. The anecdote was prized by Vitruvius as evidence of the ability of geometry to frame the environment, and respond to it; Glacken took the image of the shores as a leitmotif for a magisterial survey of relations to the natural world that we now observe expanded and refracted in the remote sensing that tracks the broad impact of how industrialization has inscribed human relations to the environment far beyond Glacken’s four on the environmental influences on human history and man’s remaking of the environment. And the problem of the continued access to shores, and future of the shores, makes us go back to some of the early work of Glacken to recover its new relevance, if only because of our failure of models to come to terms with such massive anthropogenic change.

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Filed under anthropogenic change, Climate Change, data visualization, remote observation, shoreline change

Freezing Time, Seaweed, and the Biologic Imaginary

We can all too easily lose sight of the centrality of seaweed plays in coastal habitat–even in Northern California, where seaweed washes up regularly in clumps and beds along the shore. Bull kelp and other marine plants on the sandy beaches of northern California seem otherworldly representatives of a removed marine world, but their proximity is revealed in remote mapping that promises to remap the role of seaweed in coastal ecosystems, and offer a picture of the terrifying prospects of ocean warming and climate change.

The relatively recent contraction of kelp forests across much of the offshore where they long provided such dense habitats may soon start to contract in ways never before experienced. The remapping of kelp forests, and the problems of their contraction of treasured habitat, reveal how much coastal waters demand to be seen not as so separate from the land, but part of a complex ecotone–a region where land and sea interact. Underwater species impact a large ecosystem that provides atmospheric oxygen, integral to coastal biodiversity that imparts a specific character to the California coast, and a sense of where we are–as well as makes it a destination for countless Pacific pelagic, shorebirds, and insects, as well as shellfish and fish. But the decimation of kelp forests, tied to an absence of predators to urchins, but more broadly to the ocean warming of coastal waters, as well as potentially an unprecedented increase in coastal pollution, makes both the mapping of the shrinking of kelp forests and the deciphering of that shrinking pressing problems of mapping, destined to impact a large variety of ocean and land-dwelling species.

The need for such mapping underscores all of our relation to the vital ecosystem of the shores and coastal ocean–even if we too often bracket it from our daily lives. While beached kelp may be present before our eyes, the problems of mapping of kelp forests with any fixity complicates how we process the disappearance of offshore kelp beds in an amazingly rapid timeframe. And the failure of creating an actual image capture registering the extent of kelp forests poses limits our awareness of their diminution off coastal waters. The observations of the shrinking of coastal spread of bull kelp is based on local aerial surveys, over a relatively small span of time, the accelerated roll-back of a once-vital region of biodiversity is both global, and demands to be placed in a long-term historical perspective of the way we have removed the underwater and undersea from our notion of coastal environments and of a biosphere.

Bull kelp forest coverage at four sites on the North Coast of California,from aerial surveys (California Dept. of Fish and Wildlife)

What was first registered in the plummeting of abalone, and the wasting disease of sea stars, afflicting stars from Baja to Alaska in 2013, suggest a condensation of a radical change in near-coastal environments of global proportions, paralleled by the arrival of warm waters that are not conducive to kelp growth, even before El Nino, and before the the arrival of purple urchins whose levels stars controlled, as if the result of cascading effects of a tipping point atmospheric change.

The quite sudden growth on the ocean floor of “sea urchin barrens,” where the near coastal waters are cleared of seaweeds and kelp, is a global problem. As global oceans absorb warmth of increased global warming, near-shore environments are particularly susceptible to species changes that create large disequilibria–from the bloom of phytoplankton to the rise of purple sea urchins and the dearth of shellfish–that stand to change coastal oceans. Yet the same creatures are often ones that fall of outside of our maps, even if the presence and scale of massive kelp beds and submerged forests are hard to map. And even if we see a shrinking of the large undersea submerged beds of kelp off coastal California, it is hard to have clear metrics of their shrinking over time or past extent–or of intervening in their reduction, which we seem forced to watch as inland spectators.

NASA Earth Observatory., image by Mke Taylor (NASA) using USGS data

Indeed, if the presence of coastal seaweed, and the distinctive kelp forest of California’s coastal ocean seems the distinguishing feature of its rich coastal ecology, the holdfasts of kelp forests that are grazed down by sea urchins and other predators are poorly mapped as solely underwater–they are part of the rich set of biological exchanges between the ecotone of where land meets sea, and ocean life is fed by sediment discharge and polluted by coastal communities, as much as they should be mapped as lying offshore, at a remove from the land. Yet the death of beds of kelp that is occurring globally underwater is cause for global alarm.

For from Norway to Japan to but the decline of natural predators of urchins in California has made a rapid rise of urchins on the seafloor along the coast have contributed to a shrinking of once-abundant kelp forests that produce so much of our global atmospheric oxygen. And these hidden underwater changes seem destined to rewrite our globe, as much as climate change, and threaten to change its habitability. Even as large clumps of seaweed are removed by powerful waves, that deposit piles of offshore forests ripped from holdfasts on beaches in northern California, the narrative of large coastal kelp deposits, their relation to climate change and coastal environment demands to be better mapped, as the transition of kelp to barrens afflicts so much of the coastal waters of the Atlantic and Pacific, at so many different latitudes and across such a variety of local cold water ecologies.

While the decline of kelp forests seems as radical as the clear-cutting of redwoods, it is both far more rapid and far more environmentally disruptive, if far less visible to the human eye.For in recent decades, increasingly warming waters and out of whack ecosystems have led to a massive decline of seaweed, decimated by a rise in the sea urchin population to by 10,000 percent off the California coast over only last five years, shrinking kelp forests that stand to catapult us to a future for which we have no map. The long-term decline in sea otters and sea stars, natural predators of the urchins, have removed constraints on urchin growth, which warming waters has encouraged, reducing a historical abundance of kelp in the near coastal waters across California.

This has perhaps been difficult to register due to the problems of mapping seaweed, and indeed registering kelp forests’ decline. The advance of sea urchin populations that have created barrens in coastal waters stands to disrupt and overturn some of the most abundant ecological niches in the global oceans. How has this happened under our eyes, so close tho shore and lying just undersea? We have few real maps of seaweed or kelp, lurking underwater, rather than above land, and leave out kelp from most of our maps, which largely privilege land. But the abundance of kelp that produce most of the global oxygen supply live in underwater ecotones–sensitive places between land and sea, in-between areas of shallow water, abundant sunlight, and blending of land and sea–an intersection, properly understood, between biomes, on which different biological communities depend.

Looking at the offshore seaweed near Santa Cruz, CA, I wondered if the predominantly passive registration of location–onshore registration of sites remotely by satellites, familiar from the harrowing images of the spread of fires, provided a basis to register our states of emergencies that was spectacularly unsuited to the contraction of coastal kelp, despite the huge advances of mapping techniques, and left us without a map to their contraction, or to register the subtle if radical consequences of kelp loss, and the almost as devastatingly rapid progress of their advance as populations of urchins have mowed down underseas kelp beds. For even as we strike alarms for the the decline of global kelp populations and seaweed forests as a result of the warming of offshore temperatures that place the near offshore regions at special risk of atmospheric warming–

Paul Horn, Inside Climate News/Source Wernberg and Staub,
Explaining Ocean Warming (IUCN Report, 2016)

–we lack maps of the place of seaweed and kelp beds in their ecotone, and indeed have no adequate maps of seaweed populations under threat.

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Filed under climate change, Global Warming, oceans, remote observation, seaweed

Mapping Open Waters: Bay or River?

The relation between land, sea, marsh, and landfill provided something of a dilemma of cartographical rendering in the Bay Area, mirroring the fluid relationship that has long existed between land and sea.  But if fluidity of the shoreline of the San Francisco Bay was less understood in terms of erosion, global warming, coastal flooding, and king tides back in the 1950s, the human fiction–and graphical statement–of the map of expanded bay fill provided a potent image to engage the shifting contours of land and sea. The grassroots community activists reacted to it to protest plans for a radical narrowing of the Bay, whose success created the first inter-city compact for shoreline preservation with broad consequence for habitat conservation in the Bay Area.

Save the Bay was formed by an improbably collective of interested Berkeley patricians and Sierra Club members to organize the preservation the waters from development and city housing that would build out into the bay, by eliminating wetlands by dramatically extending the shore. The military engineeer John Reber had proposed to expand the landfill of West Berkeley to extend into the San Francisco Bay, in a monument of post-war engineering that triggered compelling tool to forestall the bay’s narrowing by a massive fill at might have dramatically shrunk its size, by effectively re-engineering bay waters to a shipping lane, in the eyes of opponents. If the bottom topography of the Bay had been dramatically altered by the flushing of sediment downstream rivers as the Sacramento, bearing much sludge and sand into the neck of the Bay, infilling banks with sediment that was not there, that set an invisible precedent for the bay’s changed bed.

The proposal for the narrowing of the bay as Reber envisioned it in a blueprint helped provide the catalyst for collective action, and privileging the place of Berkeley residents who were especially shocked by the expansion of the lines of old wooden docks that dotted much of Richmond and Oakland, the two largest harbors in the East Bay, to a line of harbors that would have connected the San Rafael Bridge and Alameda Naval Station, imposing the marine cartography of expanded shipping to cover the bay waters, and indeed include a shipping channel from Oakland to Richmond, in ways that radical threatened the perception of the water from the land.

A rallying cry to mobilize opinion around the planned contraction of the East Bay by landfill, expanding the projects that would landfilled, dike or leveed wetlands for development–

–by appropriating the map of a landfill project of 1961 to generate a broad coalition of protest against the imagined expansion of housing and shipping development in the East Bay. The printed map delineated how much was at stake in proposed coastal transformation so persuasively it became a powerful logo and rallying cry for the Save the Bay project that put the breaks on the continued development of much of East and South Bay by posing a simple question that asking readers to consider themselves stakeholders in a bulwark against massive environmental change in suggesting the near-apocalyptic scale of added landfill in dark black. While the story has been often told, the vital role an engineering map played in pushing back against vested propertied and industrial interests is arresting.

The simple two-tone graphic generated a broad awareness of the region at a significant time in urban development, and helped to brakes on the inertia behind the radical reengineering of the bay as a shipping lane. The Save San Francisco Bay project that was the contribution of three women tied to educational groups and educators at the local university by marriage mobilized public opinion around the preservation as the wife of the past University President, Kay Kerr, herself “very disturbed about the filing of the bay” assembled a group disturbed by how “ongoing filling of the edges of the bay for airports, harbors, subdivisions, freeways, industrial sites and garbage dumps,” threatened to transform its open waters to a biological desert. Aptly, she calling an assembled group of conservationists and neighbors to order a meeting in a home overlooking the bay by a map of a produced by the Army Corps of Engineers calling for adding landfill that would leave “little more than a ship channel down the middle,” as she put it.

Proposed 1959 “Reber Plan” for Barriers Expanding East Bay Piers as Shipping Corridor

The City of Berkeley eager to expand to provide more housing, sought to double in size by filling in 2,000 acres of the bay shallows. Indeed, as late as 1980, the City of Berkeley hoped to expand the bay waterfront into a shopping center, resulting in the public trust over tidelands of the East Bay that preserved them from bay fill almost two decades later, in a suit that one of the first legal advisors of the Save the Bay Association directed as amicus curiae, in City of Berkeley v. Superior Court (1980) 26 Cal.3d 515, continuing to defend the bay wetlands’ integry against a defined shoreline.

The ability to stop the projected bayfill

1. While we appreciate the restoration of the complex estuary along the Bayshore, as a fluid ecotone whose wetlands provide a rich habitat that is a success of land reclamation, the near-transformation of the eastern seashore of San Francisco Bay to a large development for housing may have eased the housing crunch afflicting the Bay Area, but would have erased that seashore, without public intervention, and prepared the restoration of the wetlands as a habitat, rebuilding the sinuous streams entering marshes as a delicate membrane of freshwater and saltwater.

Eastshore Park, Albany/Richmond CA

It was begun by a realization prompted from seeing a map announcing the future re-engineering of the San Francisco Bay, reprinted in the Oakland Tribune, and contemplating the possible extent of changes that would reconfigure the shore of an area that drains up to 40% of the land of the entire state, that prompted the preservation of its open waters. The prospect of such a radical remapping of the region’s open water–more than its shores alone–invested the planning map drawn up by the Army Corps of Engineers triggered the attention among three women over tea, contemplating the reduction o the Bay–and the beauty of vistas from their windows–against the areas up for potential expansion with landfill.

The expansion of areas that were long know to be low-lying waters, filled with centuries of sediment, led Army engineers to plan contracting the San Francisco Bay to a narrow shipping channel by 2020. In response, the movement was laid for the eventual moratorium on future addition of landfill to the Bay, and agreement in a precedent-setting permanent agency overseeing all shoreline development–that called off expanding housing to the low-lying waters of the Eastern Bayshore.

Increased addition of landfill that had already reduced by the low-lying estuary of San Francisco Bay by a third, with the elimination of wetlands, and set a model for coastal zone managment that would be a model for ecological preservation.

And the ability to restore much of the saltwater marshlands around the current Bay Trail and McLaughlin Park has helped to preserve the delicate ecotonal balance that is an ecosystem for shorebirds, owls, and other animals that a comparison between older and more recent maps of shoreline development of the old wetlands of the East Bay in the late nineteenth century, where freshwater creeks fed into salt marshes that provided a delicate shoreline coastal habitat.

The project for offshore expansion was only stopped by the Bay Conservation & Development Commission (BCDC), if the overlay of maps suggest the delicate nature of the loss of wetlands at risk.

2. Despite the complexity of a bay whose shore includes over forty cities on its waters and in at 550 miles is about half the coastline of the entire state, the relcamation map simplified the massive reconfiguration of the region in ways that omitted questions of habitat or preservation entirely absent in 1960. The extent of coastal reconfiguration of the South Bay that had already proceeded, redefining its sloughs and estuaries, were in a sene extended in the proposed land reclamation project that can be seen as a huge expansion of the early expansion of Marin near Tiburon, on a scale scarcely imaginable before the postwar period. If reclaimed land had begun in wharfs and piers that extended into the San Francisco Bay’s waters in Marin, Tiburon, San Francisco and to some extent the East Bay, the cancellation of cross-bay transit was expanded in the hopes to expand land reclamation far beyond imagined, beyond southern Marin, to transform the Bay into a functional waterway tied to transport terminals.

Early USGS maps reveal the cartographic care to the sinuous paths of water running through wetland marshes on the edge of the Southern Pacific line, near Pt. Isabel and El Cerrito, where the Cerrito Creek enters the bay, in many other smaller streams that sculpt the ecotone of the bayside shore.

Can we try to recuperate these strategies of mapping a complex continuity of shoreline less as a fixed line? The interest in adding landfill to expand the shore over these wetlands would have been a huge reshaping of shoreline that imagined the line as able to be crisp, and cut across the very habitat that the National Park would recreate as habitat and open space, but which twas built out in the mid-century as a a linear shore for more railroad line, as is revealed in the above superimposition of two USGS maps.

Perhaps the most authoritative and influential assessment of filling the Bay was the reaction to the project that the Civil Engineer’s map provided after it was diffused in the local press, and readily extrapolated by East Bay readers. If the logic of reclaiming the tidal zone of much of the South Bay and Marin had developed in the post-war period, filling almost nine hundred acres at the hope of housing over 10,000, had led to the Marin Conservation League after it was proposed in 1956, by raising funds to buy back the tidelands, with help from Marin County and the California Highway Department, and Belvedere, the bayshore had less clear alliances of mutual support and advantage to depend on, but redirected opinion through a very successful map to envision the almost dystopian consequences of transforming the lung-like bay into a shipping terminal the would expand the postwar growth of the old Kaiser Shipyards–but treat the shoreline as a corridor for shipping lanes.

Future Development of the San Francisco Bay Area 1960-2020″
U.S. Army Corp of Engineers. © Corps of Engineers

As we try to recuperate the mapping strategies to show the relation of by to water, we might revisit the reworking of the shoreline and its mapping in the local imagination, because the remapping of shores crystallized one of the most important early ecological movements of land preservation.

While the image of the proposed project for narrowing the San Francisco Bay with landfill has been long forgotten, it marked a striking rhetorical redeployment of an engineering plan to stir up public opposition to the narrowing of the harbor with bay fill that John Weber had enthusiastically advocated since the late 1950s into a movement protecting the open waters as a unique open environmental space.  The transformation of a harbor that had been designed by the predominantly commercial mandates of a harbor was transformed into an ideal the aesthetic protection of open waters through the unexpected power of how the image of a lost landscape was evoked by the proposed augmentation of landfill additions that would allow the expansion of San Francisco and Berkeley as cities that could be traversed by cars; if Weber believed that the project he long championed would correct the “geographic mistake” by which the bay fragmented a master-plan for the region, seeking to shrink saltwater influx that had interrupted the expansion of a metropolis that would link Oakland and San Francisco. Reber may have compensated for his lack of formal education by his adherence to maps in his persistent promoting and continued evangelism of his vision of urban modernization of the Bay, relying on the plan as a theatrical device to accommodate the “geographic mistake” by the expansion of paved areas, locks, roads, and viaducts Robert Moses-style.

Reber_via_Anika_Erdmann_Flickr_16626562572_49a887de93_o-e1428968551652.jpg

Reber gestures to the proposed area to be filled in San Francisco Bay

But the ultimate rejection of his plan came as the very image that proposed the effects of bay fill-reduced open waters was re-presented to invite viewers to consider the definitively changed relation to place that such a massive public works construction would create.  For the map, reprinted beneath the three words “Bay or River?,” linked text and image to trigger resistance to the new relation to space that the disappearance of the Bay’s open waters  would have implied.  It prompted resistance to crystallize against the proposed public works projects to add bay fill to replace the saltwater active harbor with that would promote the expansion of urban spread and forever change the lived setting of the region.  The addition of a simple interrogative invited viewers to imagine the landscape that they desired, “Bay or River?” not only attracted more immediate attention than any of REber’s maps but mobilized opposition to the effects of encroachment with the force of a public polemic of preserving an aesthetic–rather than only commercial–landscape.

At the same time as growing public awareness was directed to the mitigation of water pollution as discharging raw sewage and pollution into harbors and rivers diminished as a common practice with passage of the first water quality laws that led to the 1960 Clean Water Act, and five years later created the Land and Water Conservation Fund for recreational spaces.  But the resistance to Reber’s plans for the closing of the open waters of the Sacramento Delta led to a collective topophilic rendering to the preservation of wetlands and estuary that prevented the impending additional of landfill to contract the San Francisco Bay that would have erased the estuary and bay alike, so resonant to lead the  Save the Bay grassroots citizens’ movement to preserve and protect its open waters against the constriction of the Delta and estuary, and erasure of open spaces of wetlands.

Bay or Rivewr

The legend transformed a plan into a polemic: the legend made the map powerfully intersect with readers’s mental geographies; by inviting viewers to map which of two futures they wanted against their experience, the image became a lodestone for preserving the open space of the bay, as well as a powerful icon of regional topohilia and an emblem of resistance to the over-engineered landscape that we identify with the proposed shrinkage of the Bay to a canal whose space would have been dominated by barriers and ship locks.

3. The more complex relation of shoreline, wetlands, and creeks that feed the bay, so typical of the South Bay as well, and some of the most important sources of sediment delivery into the Bay–

–and the many wetlands of the South Bay that were filled in during the postwar period from the 1940s, shown below in yellow, and the early areas of wetlands that were filled in or leveed 1900-1940, shown in purple, reducing some of the tidal marshes that were major areas of sediment accumulation and rich coastal wetlands.

Can we find a model of greater painstaking attention to the delineation of coastal areas that foregrounded now lost ecotones in older USGS maps that trace the definition of creeks and tidal marshes in lost historic wetlands later redefined and often obscured form maps by development and property claims? The historical tidal marshes around the Bay Area, from Albany and Richmond to Oakland, San Francisco, and Redwood City and Palo Alto, much as in Los Angeles or Green Bay, WI and New York survive in historical maps of wetlands, if they are now largely overwritten by property claims in urbanized areas by redrawing a definition of land and sea.

Historic Wetlands in USGS TopoMap, Green Bay WI (1954)
Los Angeles Creeks and Railroad Lines near Rattlesnake Island, 1896 USGS Historical TopoMap
Cordilleris Creek and Redwood City/MapCompare of USGS maps of salt flats, 1899 and 1960

But the resistance and redefinition of the bay waters in Berkeley and the East Bay offered a counter-mapping of the shorelines that resisted the addition of landfill and set a stage for environmental preservation of shoreline habitat often lost to land reclamation projects.

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March 4, 2013 · 11:02 am