Direct and Indirect Effects of Tides on Ecosystem-Scale CO 2 Exchange in a Brackish Tidal Marsh in Northern California S. H. Knox1,2, L. Windham-Myers1, F. Anderson3, C. Sturtevant4, and B. Bergamaschi3 1National Research Program, U.S. Geological Survey, Menlo Park, CA, USA, 2Department of Earth System Science, Stanford
Great Barrier Reef Changes in temperature and precipitation, and extreme events trigger indirect effects of climate change on the environment, affecting economic and social processes and systems, and natural ecosystems.
Wetlands are among the most important ecosystems on Earth both in terms of productivity and biodiversity, but also as a source of the greenhouse gas CH 4 . Microbial processes catalyzing nutrient recycling and CH<sub>4</sub> production are controlled by sediment physico-chemistry, which is in turn affected by plant activity and the foraging behaviour of herbivores.
We investigated the effects of trace metal additions on microbial nitrogen (N) and carbon (C) cycling using freshwater wetland sediment microcosms amended with micromolar concentrations of copper (Cu), molybdenum (Mo), iron (Fe), and all combinations thereof.
Impacts to wetlands could occur, but were not fully evaluated. This alternative did not meet the Step 4: Identify the full range of potential direct or indirect impacts associated with the occupancy or...
May 14, 2020 · When a wetland is lost, we do not just lose a physical space. We also lose the wetland’s ecosystem services – the essential direct and indirect benefits that nature provides to humans. Even though wetlands are much harder to find today, the wetlands that do exist are still providing a variety of ecosystem services.
Wetland algae are impacted by all types of direct and indirect impacts affecting wetlands and are excellent indicators to be used for condition and integrity assessments and to monitor environmental and climate change.
NEPA requires that direct, indirect, and cumulative impacts on wetlands be considered for compliance. Even though a project may not directly manipulate or otherwise impact a wetland, it may have adverse indirect and/or cumulative effects on the hydrology of the subject or adjacent areas.