Search
All content is free for everyone to browse, read and share. You’ll find journal articles and non-peer reviewed grey literature. Type keywords into the search box or Use the filtering options below to browse the content.
Showing 262 results
Commonness and rarity among British butterflies were examined by relating features of biology and ecology to geographical distribution. No single attr...
Read moreA mathematical model was constructed to simulate various above-ground and below-ground compartments of the producer subsystem for a shortgrass prairie...
Read moreThe foliage areas exposed to direct sunlight, or shaded from it by other foliage, can be calculated for any particular foliage-area index given the in...
Read moreSamples of Heteroptera and Auchenorrhyncha were taken from replicated plots grazed by sheep in spring, summer, autumn and winter and from ungrazed are...
Read moreThe relationship between cereal preference and rate of energy intake was studied for the mallard and 4 types of cereal grain. In a field experiment at...
Read moreThe observation that essential trace elements gave hyperbolic effects when relative accumulations (amount in plant/amount in soil) were plotted as a f...
Read moreThe populations of many UK farmland birds declined between 1970 and 1990, frequently accompanied by contractions in breeding ranges. Ornithological at...
Read moreA significant portion of the world's remaining biodiversity and agrobiodiversity is in the hands of local and indigenous communities who tend to be po...
Read moreReproductive behaviour was recorded in 23 populations of D. glomerata grown under uniform field conditions. In most populations some plants headed in ...
Read moreThe authors present a model simulating the effects of the acridid Melanoplus sanguinipes on the yield of spring wheat planted in infested stubble. The...
Read more