01:119:115 Lecture Notes - Lecture 45: Ozone Depletion, Trophic State Index, Atmospheric Chemistry
5 Apr 2016
School
Department
Course
Professor
Document Summary
Eutrophic lakes are nutrient rich and often depleted of oxygen in deep zones or throughout if ice covered in winter. oligotrophic lakes are nutrient poor and generally oxygen rich. Scientists have named and described 1. 8 million species. Humans are rapidly pushing many species toward extinction conservation biology seeks to preserve life, integrating several fields to preserve biological diversity: genetic diversity. Biodiversity: genetic diversity comprises genetic variation within a population and between populations, species diversity, species diversity is the variety of species endangered species is in danger of becoming extinct throughout all or a significant portion of its range . A threatened species is likely to become endangered in the foreseeable future. Human activity is reducing ecosystem diversity, the variety of ecosystems in the biosphere. More than 50% of wetlands in the contiguous united states have been drained and converted to other ecosystems. The local extinction of one species can have a negative impact on other species in an ecosystem.
