Now showing items 41-50 of 50
Foraging behavior as a determinant of asymmetric competitive interaction between two ant species in a tropical agroecosystem
(Springer-Verlag, 1994-07)
This work is concerned with elucidating competitive interactions between two neotropical ants, Solenopsis geminata and Pheidole radoszkowskii , focusing on their foraging behavior. When released from competition from P. ...
Optimal avoidance and evasion tactics in predator-prey interactions
(Elsevier, 1984-01-21)
A kinematic analysis of optimal avoidance and evasion techniques for prey is presented. The analysis is mainly directed towards piscivorous interactions but can include other aquatic and terrestrial cases. Avoidance is ...
The qualitative behavior of coupled predator-prey oscillations as deduced from simple circle maps
(Elsevier, 1994-05)
Qualitative patterns of the non-equilibrium behavior of coupled consumer/resource systems, formulated as a standard circle map, are explored. Patterns of demographic locking, reflected as a "devil's staircase", are observed ...
Comparing Effects of Nutrients on Algal Biomass in Streams in Two Regions with Different Disturbance Regimes and with Applications for Developing Nutrient Criteria
(Kluwer Academic Publishers; Springer, 2006-05)
Responses of stream algal biomass to nutrient enrichment were studied in two regions where differences in hydrologic variability cause great differences in herbivory. Around northwestern Kentucky (KY) hydrologic variability ...
Combined effects of atmospheric CO 2 and N availability on the belowground carbon and nitrogen dynamics of aspen mesocosms
(Springer-Verlag; Springer-Verlag Berlin Heidelberg, 2000-08)
It is uncertain whether elevated atmospheric CO 2 will increase C storage in terrestrial ecosystems without concomitant increases in plant access to N. Elevated CO 2 may alter microbial activities that regulate soil N ...
Exurban residential subdivision development: Effects on water quality and public perception
(Kluwer Academic Publishers; Springer Science+Business Media, 2004-09)
We investigated how future alternative designs for exurban residential subdivision development in agricultural landscapes might affect aquatic ecosystems and public perceptions, and we asked whether better aquatic ecological ...
Soil respiration in northern forests exposed to elevated atmospheric carbon dioxide and ozone
(Springer-Verlag, 2006-02-18)
The aspen free-air CO 2 and O 3 enrichment (FACTS II–FACE) study in Rhinelander, Wisconsin, USA, is designed to understand the mechanisms by which young northern deciduous forest ecosystems respond to elevated atmospheric ...
Microclimatic changes and the indirect loss of ant diversity in a tropical agroecosystem
(Springer-Verlag, 1996-11)
Recent changes in the coffee agroecosystem of Costa Rica were used to study the mechanism of biodiversity loss in transforming agroecosystems, focusing on the ground-foraging ant community. Coffee farms are being transformed ...
Effects of genotype on the response of Populus tremuloides michx. To ozone and nitrogen deposition
(Kluwer Academic Publishers; Springer Science+Business Media, 1992-04)
Elevated O 3 concentrations and N deposition levels co -occur in much of eastern United States. However, very little is known about their combined effects on tree growth. The effects of three O 3 treatments: charcoal-filtered ...
Oak Forests, Lopping, and the Transformation of Rural Society in Central Himalaya, India.
(2009)
Villagers are blamed for degrading the forest by lopping oak branches for fodder in the Central Himalayan region of India. Yet, research is lacking on the direct relationship between peoples’ livelihood, lopping, and forest ...