africa animals california coastalecology congresses conifers conservationofnaturalresources east ecology ecosystems effectofhumanbeingson ellesmere environmentalaspects environmentalconditions environmentalpolicy environmentalprotection environmentalscience environmentalscience(seealsochemistry forestecology freshwaterbiology greatlakes(northamerica) greatriftvalley guidebooks habitats history identification il in introducedorganisms juvenileliterature juvenilenonfiction ks lake lakeanimals lakeconservation lakefauna lakehydrology lakeplants lakes limnology local marineecology mercury mercurycycle(biogeochemistry) mi midwest(ia mn mo monolakeregion naturalhistory naturalhistory(general) nature nd ne newyorktimesbestseller newyorktimesreviewed newzealand nonindigenousaquaticpests nyt:paperback-nonfiction=2018-04-29 oh paleoecology paleolimnology physiographicdivisions plants polarregions politicalscience pondecology ponds publicpolicy rivers science sd sedimentationanddeposition selwyndistrict state streamanimals streamecology streamplants streamself-purification swamps sweden taigaecology toxicology unitedstates victoria waterlevel waterquality wetlandecology wetlands wi)