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California Aquatic Invasive Species Management Plan
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California Aquatic Invasive Species Management Plan
Department of Fish and Wildlife | February 8, 2008...
Summary
Californians have benefited from the introduction to this state of various fish, plants and other species necessary for food or other human pursuits;...
Californians have benefited from the introduction to this state of various fish, plants and other species necessary for food or other human pursuits; however, there are many other introduced species that can wreak havoc on the state’s environment and economy. Those species that cause harm and spread quickly from their point of introduction are often called “invasive.”

For these species, a single individual may produce thousands of seeds, masses of larvae or reproduce from nothing bigger than bits of stems, roots or leaves. Those that live in or near the water – aquatic invasive species – can be easily dispersed to distant water bodies or new ecosystems by currents, tides, river flows, streams, floods and other water flows.

This plan proposes management actions for addressing aquatic invasive species (AIS) threats to the State of California. It focuses on the non-native algae, crabs, clams, fish, plants and other species that continue to invade California’s creeks, wetlands, rivers, bays and coastal waters.

State surveys indicate that at least 607 species of aquatic invaders can be found in California’s estuarine waters. These invaders cause major impacts: disrupting agriculture, shipping, water delivery, recreational and commercial fishing; undermining levees, docks and environmental restoration activities; impeding navigation and enjoyment of the state’s waterways; and damaging native habitats and the species that depend on them. As the ease of transporting organisms across the Americas and around the globe has increased, so has the rate of AIS introductions.

RELATED DOCUMENT: California Aquatic Invasive Species Management Plan – Appendices

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California Aquatic Invasive Species Management Plan – Appendices
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California Aquatic Invasive Species Management Plan – Appendices
Department of Fish and Wildlife | February 8, 2008...
Summary
A: DRAFT CALIFORNIA RAPID RESPONSE PLAN B: FEDERAL AUTHORITIES, LEGISLATION & AGENCIES C: STATE AUTHORITIES, LEGISLATION & AGENCIES D: OTHER AIS INTERESTS: COORDINATING...
A: DRAFT CALIFORNIA RAPID RESPONSE PLAN
B: FEDERAL AUTHORITIES, LEGISLATION & AGENCIES
C: STATE AUTHORITIES, LEGISLATION & AGENCIES
D: OTHER AIS INTERESTS: COORDINATING COMMITTEES, EDUCATIONAL INITIATIVES & SPECIAL INTEREST GROUPS
E: AIS PLAN DEVELOPMENT & PROCESS
F: EXECUTIVE SUMMARY OF BIOLOGICAL INVASIONS: RECOMMENDATIONS FOR U.S. POLICY AND MANAGEMENT, POSITION PAPER OF ECOLOGICAL SOCIETY OF AMERICA
G: LIST OF REGULATED SPECIES IN CALIFORNIA

RELATED DOCUMENT: California Aquatic Invasive Species Management Plan

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DRERIP Ecosystem Conceptual Model: Potamcorbula amurensis
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DRERIP Ecosystem Conceptual Model: Potamcorbula amurensis
California Department of Fish and Wildlife | January 1, 1970...
Summary
Potamocorbula amurensis is a pest in the San Francisco Estuary (hereafter SFE) due to its ability to heavily graze pelagic food resources and...
Potamocorbula amurensis is a pest in the San Francisco Estuary (hereafter SFE) due to its ability to heavily graze pelagic food resources and its accumulation of toxic substances that are then moved into the food web through its predators. We begin by describing what we know of its life history and establish its life cycle within the framework of the ecological setting of the SFE. This model should be used within the context of a thought experiment, as there is not enough known about the species to design a strategy to control it in the SFE or Delta. The ultimate purpose of this conceptual model of Potamocorbula amurensis is to explore its weaknesses.

The geographic focus of the DRERIP models is the Delta. However we examine the life history patterns of Potamocorbula amurensis as far down bay as San Pablo Bay for two reasons. First, because some of the largest ecosystem effects attributed to P. amurensis are its consumption of pelagic carbon resources, it is necessary to include areas adjacent to the Delta due to the effects of tidal dispersion. Second, many of the life cycle patterns that are visible in San Pablo Bay are transferrable to upstream locations during drought periods.

Finally, we expect this model to evolve as a result of the many ongoing studies on P. amurensis. Some of the data shown in this discussion are the direct result of current CALFED studies being done jointly by California Department of Water Resources (EMP Program D. Messer and K. Gerhts) and the USGS (Analysis of Archived Samples to Assess Patterns of Historic Invasive Bivalve Biomass). Our co-investigators on that study have been gracious in allowing us to show some of that data here, before it has been published.

We start the model discussion with a brief description of the taxonomic status of this bivalve because the utility of the literature available to us is based on assumptions of the correct identification. We also very briefly describe its introduction into the SFE as a reminder of the facts about its invasion.

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Food Webs of the Delta, Suisun Bay, and Suisun Marsh: An Update on Current Understanding and Possibilities for Management
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Food Webs of the Delta, Suisun Bay, and Suisun Marsh: An Update on Current Understanding and Possibilities for Management
San Francisco Estuary and Watershed Science | October 1, 2016...
Summary
This paper reviews recent research findings on food web processes since 2008. It also highlights the idea of a changing baseline with respect...
This paper reviews recent research findings on food web processes since 2008. It also highlights the idea of a changing baseline with respect to food web function. New research indicates that interactions between habitat-specific food webs vary across the current landscape. For example, based on early work in the south Delta, the food web associated with underwater vegetation was thought to provide little support to species of concern; however, data from other regions of the estuary suggest that this conceptual model may not apply across the entire region.

Habitat restoration has been proposed as a method of re-establishing historic food web processes to support species of concern. Benefits are likely for species that directly access such restored habitats, but are less clear for pelagic species. Several issues require attention to further improve the knowledge of food webs needed to support effective management, including: (1) synthesis of factors responsible for low pelagic biomass; (2) monitoring and research on effects of harmful algal blooms; (3) broadening the scope of long-term monitoring; (4) determining benefits of tidal wetland restoration to species of concern, including evaluations of interactions of habitat-specific food webs; and (5) interdisciplinary analysis and synthesis.

The only certainty is that food webs will continue to change in response to the changes in the physical environment and new species invasions.

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Invasive Species: Major Laws and the Role of Selected Federal Agencies
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Invasive Species: Major Laws and the Role of Selected Federal Agencies
Congressional Research Service | January 17, 2017...
Summary
In the United States, numerous federal and interagency efforts share responsibilities regarding invasive species. Among the federal agencies involved are the Departments of...
In the United States, numerous federal and interagency efforts share responsibilities regarding invasive species. Among the federal agencies involved are the Departments of Agriculture, Commerce, Defense, Homeland Security, Interior, Transportation, and others, including the Environmental Protection Agency and the Executive Office of the President. Of these, three Departments—Agriculture, Commerce, and Interior—play a major role by co-chairing the National Invasive Species Council (NISC). Created by Executive Order 13112 in 1999, NISC provides high-level interdepartmental coordination of federal invasive species actions and works with other federal and nonfederal groups to address invasive species issues at the national level.

In FY2016, the U.S. government spent an estimated $2.3 billion across a range of federal agencies and activities in an effort to prevent, control, and eradicate invasive species domestically. Activities at the Department of Agriculture accounted for the bulk of available federal funding, nearly $1.2 billion (53% of total available funds). Activities at the Department of Homeland Security, comprised of mostly border protection and security activities, accounted for about $0.8 billion (33% of total funding). The remainder of federal funding, about $0.3 billion (about 14% of total funding) covers activities across a range of agencies at the Departments of Interior, Commerce, and Defense, and other independent agencies.

Despite efforts to achieve high-level interdepartmental coordination, comprehensive legislation on the treatment of invasive species has never been enacted, and no single law provides coordination among federal agencies. Instead, the current legal framework is largely governed by a patchwork of laws, regulations, policies, and programs. Some laws are tailored to individual species or narrowly focused on what is affected by the species. Other laws have a broader intended purpose and may only peripherally address invasive species. Some laws, although they do not directly address invasive species control or prevention, may limit such introductions.

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Projected Effects of Future Climates on Freshwater Fishes of California
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Projected Effects of Future Climates on Freshwater Fishes of California
California Energy Commission | July 31, 2012...
Summary
A methodology is presented that allows systematic evaluation of climate change impacts on freshwater fishes in California (121 native fish taxa and 43...
A methodology is presented that allows systematic evaluation of climate change impacts on freshwater fishes in California (121 native fish taxa and 43 aliens). The methodology uses expert opinions of the authors and literature reviews of status and biology of the fishes to score both status of each species (“baseline vulnerability”) and likely impact of climate change (“climate change vulnerability”). Baseline and climate change vulnerability scores were highly correlated with one another and were consistent among different scorers. Native species were found to have both greater baseline and greater climate change vulnerability than alien species.

Fifty percent of natives had critical or high baseline vulnerability versus none for aliens; 83 percent had critical or high climate change vulnerability versus 19 percent for aliens. Fishes with high baseline vulnerability were also likely to have highest vulnerability to climate change. These results show that predicted climate change effects on fresh water environments will dramatically change the fish fauna at all scales and at all elevations. The research team concluded that most native fishes will suffer population declines and become more restricted in their distributions; some will likely be driven to extinction, if present trends continue.

Fishes requiring cold water (<22°C [72°F]) are particularly likely to go extinct. In contrast, most alien fishes will thrive, with many species likely to increase in abundance and range. However, even many aliens will ultimately be negatively affected through loss of aquatic habitats during severe droughts and stressful conditions in most waterways during summer months. On a regional scale (e.g., San Francisco Bay tributaries), vulnerability patterns follow statewide patterns and indicate the need for conservation strategies adapted to local conditions. Studies of three streams with long?term data on fish abundance indicate that native and alien species respond in different ways to variability in stream flow, which is likely to become more variable with climate change.

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California Aquatic Invasive Species Management Plan

California Aquatic Invasive Species Management Plan

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California Aquatic Invasive Species Management Plan – Appendices

California Aquatic Invasive Species Management Plan – Appendices

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DRERIP Ecosystem Conceptual Model: Potamcorbula amurensis

DRERIP Ecosystem Conceptual Model: Potamcorbula amurensis

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Food Webs of the Delta, Suisun Bay, and Suisun Marsh: An Update on Current Understanding and Possibilities for Management

Food Webs of the Delta, Suisun Bay, and Suisun Marsh: An Update on Current Understanding and Possibilities for Management

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Invasive Species: Major Laws and the Role of Selected Federal Agencies

Invasive Species: Major Laws and the Role of Selected Federal Agencies

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Projected Effects of Future Climates on Freshwater Fishes of California

Projected Effects of Future Climates on Freshwater Fishes of California

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