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| Eagle Creek (1) | Eagle Rock (1) | earethquakes (1) |
| Earley Creek (1) | Early Creek (1) | earthquakes (248) |
| East Creek (1) | East Creek (Nestucca River) (1) | East Foley Creek (2) |
| East Fork (2) | East Fork Copeland Creek (1) | East Fork Green River (1) |
| East Fork Lobster Creek (9) | East Fork Lobster Creek (Alsea River) (1) | East Fork Millicoma River (1) |
| East Fork Quarry Creek (1) | East Fork Rock Creek (2) | East Fork Scott Creek (1) |
| East Fork Simpson Creek (1) | East Fork Steamboat Creek (1) | East Fork Trask River (2) |
| East Gardiner (1) | East Olalla Creek (1) | East Pass Creek (1) |
| East Twin Lake (1) | eastern oyster = Crassostrea virginica (8) | eastern oyster=Crassostrea virginica (22) |
| echinoderms (2) | Echinoidea (1) | Echinorhynchus species (3) |
| Echo Creek (1) | Echo Island (1) | Echo Island Bar (1) |
| Eckman Creek (6) | Eckman Lake (6) | Eckman Lake (Alsea River) (1) |
| Eckman Slough (12) | Ecola Creek (10) | Ecological health (3) |
| ecological succession (31) | ecological values (73) | ecology (21) |
| Economic development (4) | economics (288) | ecosystem engineer (1) |
| ecosystem health (67) | ecosystem modeling (47) | ecosystem respiration (1) |
| Edan Creek (1) | Eddyville (3) | Eddyville (Or.) (1) |
| edible oyster = Ostrea edulis (1) | edible oyster=Ostrea edulis (17) | Edna Lake (5) |
| education (3) | Eel Creek (1) | Eel Lake (7) |
| Eel River (5) | Eel River (California) (1) | Eel River Basin (1) |
| eelgrass = Zostera marina (78) | Eelgrass isopod = Pentidotea resecata (1) | eelgrass=Zostera japonica (11) |
| eelgrass=Zostera marina (35) | EF Trask River (2) | Eggleston Creek (2) |
| Eglish sole = Parophrys vetulus (2) | Eglish sole = Pleuronectes vetulus (1) | Egypt (4) |
| El Nino (40) | Elephant Rock (2) | elevation (2) |
| Elgarose Creek (2) | Elk City (31) | Elk City (Or.) (1) |
| Elk Cree (1) | Elk Creek (53) | Elk Creek (Umpqua) (1) |
| Elk Meadow (1) | Elk River (40) | Elk River estuary (13) |
| Elk River Hatchery (1) | Elk Valley Creek (1) | Elkhorn Creek (2) |
| Elkhorn Slough (1) | Elkton (10) | Elkton (Or.) (6) |
| Elkton/Scottsburg/Kellogg (1) | Ellensburg Formation (1) | Elliott State Forest (1) |
| Embarcadero Marina (5) | Embayments (1) | Embiotocidae = surf perches (1) |
| Emile Creek (6) | Emile Sump (1) | Empire Flat (5) |
| emporer goose=Philacte canagica (1) | endangered species (45) | endrin (1) |
| energetics (2) | energy (8) | Engels Creek (1) |
| engineering (13) | England (1) | English sole = Parophrys vetulus (16) |
| English sole = Parophrys vetulus taxonomy (1) | English sole = Pleuronectes vetulus (11) | English sole=Parophrys vetulus (3) |
| English sole=Pleuronectes vetulus (22) | Ensatina = Ensatina eschscholtzii (1) | Enteromorpha prolifera (Ulva prolifera) (1) |
| Enteromorpha species (17) | Enteromorpha species eelgrass=Zostera marina (1) | ENV) (1) |
| environmental change (2) | environmental disturbance (2) | environmental education (15) |
| environmental impact statement (1) | environmental impact, land use, Siuslaw National Forest, Benton County, Lane County, Lincoln County, spotted owl = Strix occidentalis, bald eagle = Haliaeetus leucocephalus, forest management, Rock Creek (Alsea), RARE II, Cummins Creek, Drift Creek (1) | environmental law and policy (117) |
| environmental law and policy, estuarine dynamics, general, habitat conservation, habitat restoration, human impacts, marsh restoration, wetland mitigation, wetland restoration, (1) | environmental legislation and policy (1) | environmental monitoring (9) |
| environmental policy and law (211) | environmental tourism (1) | environmental values (1) |
| Eocene (205) | Eogammarus confervicolus (3) | Eohastorius brevicuspis (1) |
| Eohaustorius (1) | Eohaustorius estuarius (1) | Eohaustorius species (6) |
| Epiphytes (1) | Epithemia sorex Kutzing (1) | Erickson Creek (3) |
| Ericson Creek (1) | erosion (260) | erosion data (8) |
| erosion landslides (2) | Eruptions (12) | erythrocytic inclusion body syndrome (1) |
| erythrocytic necrosis virus (1) | erythrocytic necrosis virus or erythrocytic inclusion body syndrom (EIBS (1) | erythrocytic necrosis virus or erythrocytic inclusion body syndrom (EIBS/ENV) (2) |
| Eslick Creek (2) | estuaries (85) | estuariine dynamics (1) |
| estuarine dynamics (135) | estuarine mitigation (1) | Etchegoin Formation (1) |
| ethnography (3) | ethnology (1) | Euchre Creek (24) |
| Euchre Creek (Siletz) (4) | Euchre Mountain (3) | Eugene Formation (1) |
| Eumorea americana (1) | Eurasian watermilfoil = Myriophyllum spicatum (1) | Eureka (Ca.) (1) |
| Europe (2) | European beachgrass = Ammophila arenaria (1) | European ear radix = Radix auricularia (2) |
| European green crab = Carcinus maenas (16) | European green crab = Carcinus maenus (1) | European marram grass = Ammophila arenaria (1) |
| Eurytemora species (3) | Eustrongylides spp. (1) | Eutectics (1) |
| eutrophication (14) | eutropication (1) | Evadne species (1) |
| Evarts Creek (1) | evolution (8) | evolutionary biology (1) |
