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  2. Lake ecosystem - Wikipedia

    en.wikipedia.org/wiki/Lake_ecosystem

    These organisms can affect natives via competition for prey or habitat, predation, habitat alteration, hybridization, or the introduction of harmful diseases and parasites. [6] With regard to native species, invaders may cause changes in size and age structure, distribution, density, population growth, and may even drive populations to ...

  3. Essential fish habitat - Wikipedia

    en.wikipedia.org/wiki/Essential_Fish_Habitat

    Habitat characteristics include sediment type, type of bottoms (sand, silt and clay), structures underlying the water surface, and aquatic community structures. These habitats are essential for fish and ecosystem health. The fundamental habitat structure begins with sediment. Erosion is stabilized by submerged aquatic vegetation.

  4. Pond - Wikipedia

    en.wikipedia.org/wiki/Pond

    Researchers for the British charity Pond Conservation (now called Freshwater Habitats Trust) have defined a pond to be 'a man-made or natural waterbody that is between 1 m 2 (0.00010 hectares; 0.00025 acres) and 20,000 m 2 (2.0 hectares; 4.9 acres) in area, which holds water for four months of the year or more.'

  5. Vernal pool - Wikipedia

    en.wikipedia.org/wiki/Vernal_pool

    Vernal pools, also called vernal ponds or ephemeral pools, are seasonal pools of water that provide habitat for distinctive plants and animals. They are considered to be a distinctive type of wetland usually devoid of fish, and thus allow the safe development of natal amphibian and insect species unable to withstand competition or predation by ...

  6. Freshwater ecosystem - Wikipedia

    en.wikipedia.org/wiki/Freshwater_ecosystem

    There are three basic types of freshwater ecosystems: Lentic (slow moving water, including pools, ponds, and lakes), lotic (faster moving water, for example streams and rivers) and wetlands (areas where the soil is saturated or inundated for at least part of the time). [2] [1] Freshwater ecosystems contain 41% of the world's known fish species. [3]

  7. California aims to introduce more anglers to native warm ...

    www.aol.com/news/california-aims-introduce-more...

    California’s only native sunfish, the Sacramento perch, survived catastrophic floods in the 1860s and was so abundant that it was a regular staple in San Francisco’s markets before invasive ...

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