Category Nursing Essays

Nursing Essays

What is a keystone species? Paine (1966, 1969) experimented with

What is a keystone species? Paine (1966, 1969) experimented with two sea stars that act as keystone species in their intertidal communities along the west coast of North America and in New Zealand. Describe how the intertidal communities in these…

October 7, 2019

Nursing Essays

Winemiller (1990) deleted “weak” trophic links from one set of

Winemiller (1990) deleted “weak” trophic links from one set of food webs that he described for fish communities in Venezuela (see fig. 17.3). What was his criterion for designating weak interactions? Earlier, Paine (1980) suggested that ecologists could learn something…

October 7, 2019