Historical ecology of a central California estuary: 150 years of habitat change

  title={Historical ecology of a central California estuary: 150 years of habitat change},
  author={Eric Van Dyke and Kerstin Wasson},
We investigated the historical ecology of Elkhorn Slough, a 1,200 ha tidal wetland system in central California. The goal of this study was to identify patterns of change in the extent and distribution of wetland habitats during a 150-yr period and to investigate the causes of these changes. Using a geographic information system (GIS), we interpreted historic maps, charts, and aerial photographs. We created a series of summary maps to illustrate and quantify changes in tidal flow and habitat… 

Habitat change in the lower Columbia River estuary, 1870–2009

We conducted a spatial analysis of long term land cover change for the lower Columbia River estuary and its floodplain by comparing GIS representations of late 1800’s maps (Office of Coast

Historical landscape ecology of an urbanized California valley: wetlands and woodlands in the Santa Clara Valley

This study synthesized a heterogeneous array of historical sources to reconstruct historical land cover in California’s Santa Clara Valley, suggesting that reliable historical landscape reconstructions can be developed in the absence of standardized historical data sources and can be of value even in highly modified regions.

Recent (1975–2004) Vegetation Change in the San Francisco Estuary, California, Tidal Marshes

Abstract WATSON, E.B. and BYRNE, R., 2012. Recent (1975–2004) vegetation change in the San Francisco Estuary, California, tidal marshes. The establishment and monitoring of vegetation plots provide

Historical Ecology as a Tool for Assessing Landscape Change and Informing Wetland Restoration Priorities

Vast resources are devoted annually to watershed management and wetland restoration. Historical wetland losses are often cited as a motivation for prioritizing ambitious wetland restoration efforts.

Decadal Changes in a Pacific Estuary: A Multi-Source Remote Sensing Approach for Historical Ecology

In Pacific Coast salt marshes, only color and color IR aerial photography provide the spatial, spectral, and temporal resolution required to conduct long-term historic time series analysis of wetland

Use of historical remote sensing to link watershed land use change and wetland vegetation response in a California estuary

Elkhorn Slough, a National Estuarine Research Reserve, is one of the most important estuarine systems in California. Despite the protection status of Elkhorn Slough, agriculture in its watershed has

The fish community of a newly restored southern California estuary: ecological perspective 3 years after restoration

Bays and estuaries are considered essential fish habitat, yet in many parts of the world, these areas have been degraded or destroyed. In southern California, habitat restoration has become a widely

Expansion of Tidal Marsh in Response to Sea-Level Rise: Gulf Coast of Florida, USA

Understanding the influence of future sea-level rise (SLR) on coastal ecosystems is improved by examining response of coastlines during historic periods of SLR. We evaluated stability and movement of

Ecotones as Indicators of Changing Environmental Conditions: Rapid Migration of Salt Marsh–Upland Boundaries

Ecotones, the narrow transition zones between extensive ecological systems, may serve as sensitive indicators of climate change because they harbor species that are often near the limit of their

Reconstructing the collapse of wetland networks in the Swiss lowlands 1850–2000

In Central Europe vast wetland areas have been converted into agricultural land over the past few centuries. Long-term spatially explicit reconstructions of wetland cover changes at regional scale



Geospatial habitat change analysis in Pacific Northwest coastal estuaries

We assessed historical changes in the location and amount of potential estuarine habitat in three of the four largest coastal estuaries in the United States Pacific Northwest (Grays Harbor, Willapa

Physical Evolution of Restored Breached Levee Salt Marshes in the San Francisco Bay Estuary

A review of the history of 15 re-flooded sites indicates that marshplain vegetation with more than 50% cover was established at nine of the sites within 4 to 20 years, and that the formation of tidal channels within the marshes is greatly dependent on whether and how high the site was filled before breaching.

Historical Changes in the Tidal Marsh of Tomales Bay and Olema Creek, Marin County, California

Maps of the Tomales Bay and Olema Valley region, located 65 km north of San Francisco, were first published about 1860. We compared these maps with more recent topographic maps to determine

Wetland loss in the Northern Gulf of Mexico: Multiple working hypotheses

I examined four hypotheses about causes for the dramatically high coastal wetland losses (0.86% yr−1) in the northern Gulf of Mexico: an extensive dredged canal and spoil bank network, a decline in

Coastal salt marsh systems in the U.S.: A review of anthropogenic impacts

During the past century, human modification of environmental systems has greatly accelerated tidal salt marsh deterioration and shoreline retreat in many coastal regions worldwide. As a result, more

Historic Evolution of a Marsh Island: Bloodsworth Island, Maryland

High rates of relative sea-level rise in the Chesapeake Bay of about 0.3 m/century has caused rapid land loss of the Bay islands. This study is the first quantitative analysis of both perimeter and

Pattern and process of land loss in the Mississippi Delta: A Spatial and temporal analysis of wetland habitat change

An earlier investigation (Turner 1997) concluded that most of the coastal wetland loss in Louisiana was caused by the effects of canal dredging, that loss was near zero in the absence of canals, and

Mid-Texas Coastal Marsh Change (1939-1991) as Influenced by Lesser Snow Goose Herbivory

Emergent coastal marshes of the San Bernard National Wildlife Refuge (SBNWR), were evaluated from 1939 to 1991 using aerial photography and 8 geographic information system (GIS). Vegetated marsh was

Temporal and spatial patterns in abundance and diversity of fish assemblages in Elkhorn Slough, California

Assemblages of ichthyofauna of shallow inshore habitats along Californía’s central coast are described in terms of species composition, abundance, and life-style categories. A total of 22,334 fishes