Found 19 datasets matching filters.
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These data identify the mean population growth rate and ratio change in abundance of common raven (Corvus corax; ravens) populations from 1966 through 2018, delineated by ecoregions defined by the...
Search relevance: 1.00 | Views last month: 8 | Catalog Last Checked: May 05, 2026 at 08:39 PM -
These data identify the mean annual population growth rate and ratio change in abundance of common raven (Corvus corax; ravens) populations from 1966 through 2018.
Search relevance: 1.00 | Views last month: 6 | Catalog Last Checked: May 05, 2026 at 07:56 PM -
The Ecomap 2025 contains a feature class for five different levels of the National Hierarchical Framework of Ecological Units (the Hierarchy. FSM 2060): Ecological Domains, Ecological Divisions,...
Search relevance: 1.00 | Views last month: 5 | Catalog Last Checked: May 05, 2026 at 11:48 PM -
This data release provides output produced by a statistical, aridity threshold fire model for 11 extensively forested ecoregions in the western United States. We identified thresholds in...
Search relevance: 1.00 | Views last month: 5 | Catalog Last Checked: May 05, 2026 at 09:12 PM -
This map service displays Level III and Level IV Ecoregions of the United States and was created from ecoregion data obtained from the U.S. Environmental Protection Agency Office of Research and...
Search relevance: 1.00 | Views last month: 5 | Catalog Last Checked: May 06, 2026 at 12:33 AM -
In 2015, the second of several Regional Stream Quality Assessments (RSQA) was done in the southeastern United States. The Southeast Stream Quality Assessment (SESQA) was a study by the U.S....
Search relevance: 1.00 | Views last month: 5 | Catalog Last Checked: May 05, 2026 at 09:38 PM -
The Ecomap 2025 contains a feature class for five different levels of the National Hierarchical Framework of Ecological Units (the Hierarchy. FSM 2060): Ecological Domains, Ecological Divisions,...
Search relevance: 1.00 | Views last month: 5 | Catalog Last Checked: May 05, 2026 at 11:48 PM -
This tabular data set represents the percent of United States Environmental protection Agency's (U.S. EPA) Level 3 Regions compiled for two spatial components of the NHDPlus version 2 data suite...
Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: May 05, 2026 at 08:41 PM -
The Ecomap 2025 contains a feature class for five different levels of the National Hierarchical Framework of Ecological Units (the Hierarchy. FSM 2060): Ecological Domains, Ecological Divisions,...
Search relevance: 1.00 | Views last month: 4 | Catalog Last Checked: May 05, 2026 at 11:48 PM -
In 2013, the first of several Regional Stream Quality Assessments (RSQA) was done in the Midwest United States. The Midwest Stream Quality Assessment (MSQA) was a collaborative study by the U.S....
Search relevance: 1.00 | Views last month: 3 | Catalog Last Checked: May 05, 2026 at 08:48 PM -
The Ecomap 2025 contains a feature class for five different levels of the National Hierarchical Framework of Ecological Units (the Hierarchy. FSM 2060): Ecological Domains, Ecological Divisions,...
Search relevance: 1.00 | Views last month: 3 | Catalog Last Checked: May 05, 2026 at 11:48 PM -
The Ecomap 2025 contains a feature class for five different levels of the National Hierarchical Framework of Ecological Units (the Hierarchy. FSM 2060): Ecological Domains, Ecological Divisions,...
Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: May 05, 2026 at 11:48 PM -
These data identify the mean annual population growth rate and ratio change in abundance of common raven (Corvus corax; ravens) populations from 1966 through 2018.
Search relevance: 1.00 | Views last month: 2 | Catalog Last Checked: May 05, 2026 at 09:40 PM -
Ecological Subsection mapping product for Bering Land Bridge National Preserve.
Search relevance: 1.00 | Views last month: 1 | Catalog Last Checked: March 04, 2026 at 06:49 AM -
The dataset was originally issued in 2007 by the USDA Forest Service Washington Office-Ecosystem Management Coordination staff. The Forest Carbon Plan ecoregions generally follow subsection...
Search relevance: 1.00 | Views last month: 0 | Catalog Last Checked: March 28, 2026 at 07:38 PM -
The objective of this project is to develop a simple approach for estimating the marine survival and causes of trends in survival. Data is a summary of ecosystem indicators of coho salmon marine survival.
Search relevance: 1.00 | Views last month: 0 | Catalog Last Checked: April 12, 2026 at 07:44 PM -
Data are from 1,000 river and stream sites across the conterminous US where consistent biological, chemical, physical and watershed data were gathered. The sites were selected using a probability...
Search relevance: 1.00 | Views last month: 0 | Catalog Last Checked: April 21, 2026 at 07:56 PM -
Over one half of the worlds fish production for human consumption currently comes from aquaculture, while wild fisheries yields are either stable or declining. Recurring threats from the...
Search relevance: 1.00 | Views last month: 0 | Catalog Last Checked: April 12, 2026 at 07:41 PM -
This layer contains polygon features of Ecological Units for the state of California as described by ECOMAP (1993) "... mapped based on associations of those biotic and environmental factors that...
Search relevance: 1.00 | Views last month: 0 | Catalog Last Checked: July 29, 2025 at 01:31 AM
