17 research outputs found
Disturbance-diversity relationships in two lakes of similar nutrient chemistry but contrasting disturbance regimes
Phytoplankton diversity was studied in two North German lakes of comparable nutrient chemistry but different exposure to winds. In both lakes, phytoplankton was primarily N-limited but diatoms were Si-limited. PluĂsee had a very constant mixing depth during summer, while week-to-week changes of several meters were quite common in the more exposed Behler See. In PluĂsee, phytoplankton biomass during summer came closer to the carrying capacity as defined by the available total N. In PluĂsee there was a marked decline of diversity during the summer maximum of biomass, while this decline was less pronounced in Behler See. It is concluded that disturbances which prevented phytoplankton from reaching the carrying capacity also maintained a high level of diversity. A negative response of diversity to undisturbed conditions became apparent, after phytoplankton biomass had exceeded about 5% of the carrying capacity
1969: Abilene Christian College Bible Lectures - Full Text
GODâS ETERNAL PURPOSE
Being the Abilene Christian College Annual Bible Lectures 1969
Published by
ABILENE CHRISTIAN COLLEGE BOOK STORE
ACC Station Abilene, Texas 7960
Redalyc.Policymaking in Education: Understanding Influences on the Reading Excellence Act
Abstract Educators and researchers are being called to participate in language and literacy policy makin