Filters: Tags: Aquatic organisms (X)
2 results (2.9s)|
Filters
|
Summary 1. Historically, biogeographic barriers to the movement of aquatic organisms existed at multiple spatial scales and contributed to the development of unique regional faunas. At increasing spatial scales, these barriers consisted of waterfalls and cascades; catchment divides; major mountain ranges and oceans. This hierarchy of movement barriers produced increasingly distinct aquatic biotas at larger drainage units. 2. Humans have provided a variety of pathways by which aquatic species can circumvent historical biogeographic barriers. These include both authorised and unauthorised stocking, construction of canals and water conveyance systems, transport in ship ballast water, fishing and angling gear (including...
Categories: Publication;
Types: Citation,
Journal Citation;
Tags: Freshwater Biology,
United States,
aquatic organisms,
biogeographic barriers,
connectivity,
During 2013 and 2014 aquatic invertebrates were collected and vegetation was inventoried from sample locations distributed throughout Pool 10 and West Pool of Big Stone National Wildlife Refuge. Invertebrate sampling was conducted using aquatic activity traps and by collecting organisms from submersed vegetation. Vegetation was inventoried through a combination of visual observation and collection using the rake method. In conjunction with the invertebrate and vegetation sampling, water depth was recorded and the following water-quality parameters were collected using a multi-parameter Sonde: dissolved oxygen, oxidation-reduction potential, pH, specific conductance, water temperature, and turbidity. For the aquatic...
Categories: Data;
Types: Citation;
Tags: Aquatic Plants,
Aquatic insects,
Aquatic organisms,
Big Stone National Wildlife Refuge,
Freshwater ecosystems,
|
|
