PRIMARY PRODUCTION AND ENERGY FLOW
... ¾ Lower respiration rate due to lower biomass ¾ Reduced self-shading ¾ Improved water balance due to reduced leaf area ...
... ¾ Lower respiration rate due to lower biomass ¾ Reduced self-shading ¾ Improved water balance due to reduced leaf area ...
Modeling nutrient transport and transformation by pool
... entering the pool were gravid (Berven, 1981). We determined clutch size by pairing females (average of 40 females each year; range 13–79) with a male in a pan of water and allowing them to deposit their eggs. After egg deposition, we counted the number of eggs in each clutch. We then used the relati ...
... entering the pool were gravid (Berven, 1981). We determined clutch size by pairing females (average of 40 females each year; range 13–79) with a male in a pan of water and allowing them to deposit their eggs. After egg deposition, we counted the number of eggs in each clutch. We then used the relati ...
Management of Fish in Ontario - Backgroud Report Supporting
... Fish communities can be classified in a number of different ways. In Ontario, fish communities are typically thought of in terms of their lakedwelling versus riverine populations and water temperature (i.e., coldwater, coolwater and warmwater). Although not every waterbody supports species that conv ...
... Fish communities can be classified in a number of different ways. In Ontario, fish communities are typically thought of in terms of their lakedwelling versus riverine populations and water temperature (i.e., coldwater, coolwater and warmwater). Although not every waterbody supports species that conv ...
The impact of fish predation on invasive rusty crayfish
... populations. Habitat has already been shown to differ between the two lakes (S.D. Pecoraro, unpublished data). Other environmental factors such as temperature, dissolved oxygen content, water turbidity, and pH could differ between the lakes, causing a more favorable environment for crayfish in Big L ...
... populations. Habitat has already been shown to differ between the two lakes (S.D. Pecoraro, unpublished data). Other environmental factors such as temperature, dissolved oxygen content, water turbidity, and pH could differ between the lakes, causing a more favorable environment for crayfish in Big L ...
Impact of changing ice cover on pelagic productivity and food web
... period. The consequence of a changing ice cover on the food web structure and production in Disko Bay, Western Greenland, is analysed through application of a dynamical model for the planktonic food web. The model is successfully calibrated and tested for sensitivity, using a detailed data set for 1 ...
... period. The consequence of a changing ice cover on the food web structure and production in Disko Bay, Western Greenland, is analysed through application of a dynamical model for the planktonic food web. The model is successfully calibrated and tested for sensitivity, using a detailed data set for 1 ...
Variation in marine benthic community composition allows discrimination of multiple stressors
... powerful yet potentially cost-effective biological indicator that discriminates between the effects of the 2 generic classes of pollutants, i.e. organic enrichment and toxicants. Specifically, we predicted that marine Annelida would increase in abundance in response to sediment organic enrichment, w ...
... powerful yet potentially cost-effective biological indicator that discriminates between the effects of the 2 generic classes of pollutants, i.e. organic enrichment and toxicants. Specifically, we predicted that marine Annelida would increase in abundance in response to sediment organic enrichment, w ...
Deep-Sea Eukaryote Ecology of the Semi
... ing in the Okhotsk Sea is the inflow of dense Pacific seawater, through the deep passages between the Kurile Islands, into the deepest parts of the sea. The deep water masses in the Okhotsk Sea consist of a transient layer between 150 and 750 m with a temperature of 0 to 2.0°C and salinity of 33.2 t ...
... ing in the Okhotsk Sea is the inflow of dense Pacific seawater, through the deep passages between the Kurile Islands, into the deepest parts of the sea. The deep water masses in the Okhotsk Sea consist of a transient layer between 150 and 750 m with a temperature of 0 to 2.0°C and salinity of 33.2 t ...
Spatiotemporal food web dynamics along a desert riparian–upland
... spillover predation may occur where mobile predators consume prey species that occupy different habitats (Holt 1984). Nevertheless, only a few field studies have directly addressed the spillover predation hypothesis (Kristan and Boarman 2003, Storch et al. 2005, Rand and Louda 2006), in contrast wit ...
... spillover predation may occur where mobile predators consume prey species that occupy different habitats (Holt 1984). Nevertheless, only a few field studies have directly addressed the spillover predation hypothesis (Kristan and Boarman 2003, Storch et al. 2005, Rand and Louda 2006), in contrast wit ...
Use of the littoral zone by introduced
... The median length of age-0 coho salmon recruited into the littoral zone in May 1993 was 32 mm; insuffi cient numbers were captured in 1992 to estimate the median length of fry (Table 4). By September 1993 the median length was 60 mm. The August median length of age-1 coho salmon (89 mm) was slightl ...
... The median length of age-0 coho salmon recruited into the littoral zone in May 1993 was 32 mm; insuffi cient numbers were captured in 1992 to estimate the median length of fry (Table 4). By September 1993 the median length was 60 mm. The August median length of age-1 coho salmon (89 mm) was slightl ...
Guide to - Duke Farms
... ash in moister areas. Hundreds of other plant species live under the canopy that these trees provide. Woodland habitats have great value as suppliers of timber, protectors of soil and water, and cleansers of air. Tall trees with a diverse, shaded understory once covered most of this region, but thei ...
... ash in moister areas. Hundreds of other plant species live under the canopy that these trees provide. Woodland habitats have great value as suppliers of timber, protectors of soil and water, and cleansers of air. Tall trees with a diverse, shaded understory once covered most of this region, but thei ...
Ecosystems and Environment
... • The littoral zone—close to the water surface and to shore, relatively warm because of its exposure to sunlight. • The limnetic zone—close to the water surface but far from shore, occupied largely by plankton, organisms that float in the water rather than swim actively. • The profundal zone—deep wa ...
... • The littoral zone—close to the water surface and to shore, relatively warm because of its exposure to sunlight. • The limnetic zone—close to the water surface but far from shore, occupied largely by plankton, organisms that float in the water rather than swim actively. • The profundal zone—deep wa ...
PP Chapter 21 Text
... • The littoral zone—close to the water surface and to shore, relatively warm because of its exposure to sunlight. • The limnetic zone—close to the water surface but far from shore, occupied largely by plankton, organisms that float in the water rather than swim actively. • The profundal zone—deep wa ...
... • The littoral zone—close to the water surface and to shore, relatively warm because of its exposure to sunlight. • The limnetic zone—close to the water surface but far from shore, occupied largely by plankton, organisms that float in the water rather than swim actively. • The profundal zone—deep wa ...
13.1 Ecologists Study Relationships
... 13.4 Assessment: how might an oil spill in the ocean affect an aquatic food web? What might happen to the food web on the land located near ther oil spill? Explain. • The entire food web would be affected by an oil spill • Oily water may kill off the phytoplankton • The loss of smaller fish would af ...
... 13.4 Assessment: how might an oil spill in the ocean affect an aquatic food web? What might happen to the food web on the land located near ther oil spill? Explain. • The entire food web would be affected by an oil spill • Oily water may kill off the phytoplankton • The loss of smaller fish would af ...
Stoichiometry of nutrient recycling by vertebrates in a tropical stream
... excretion ratio was caused largely by variation in body P content rather than by body W content. Variance inflation factors for multiple regressions were relatively low (Table 1), suggesting that analyses were not greatly biased by multicollinearity among variables. The relationship between body P c ...
... excretion ratio was caused largely by variation in body P content rather than by body W content. Variance inflation factors for multiple regressions were relatively low (Table 1), suggesting that analyses were not greatly biased by multicollinearity among variables. The relationship between body P c ...
The white clawed crayfish
... national decline of the white-clawed crayfish. Many populations of the native species, especially in the south, were lost to the disease from the 1980’s onwards. It is thought that the disease is mainly spread by the non-native species which appear to be unaffected. Spores of the fungus can spread t ...
... national decline of the white-clawed crayfish. Many populations of the native species, especially in the south, were lost to the disease from the 1980’s onwards. It is thought that the disease is mainly spread by the non-native species which appear to be unaffected. Spores of the fungus can spread t ...
Ciliate (Euplotes sp.) predation by Pseudodiaptomus annandalei
... the presence and absence of an algal diet. The experimental protocol included the following: (a) ciliate prey alone, (b) ciliates with I. galbana, (c) ciliates with T. chui, and (d) ciliates with I. galbana and T. chui. Known-age individuals of P. annandalei were collected from stock cultures and tr ...
... the presence and absence of an algal diet. The experimental protocol included the following: (a) ciliate prey alone, (b) ciliates with I. galbana, (c) ciliates with T. chui, and (d) ciliates with I. galbana and T. chui. Known-age individuals of P. annandalei were collected from stock cultures and tr ...
nile perch - The Pringle Lab at Princeton
... tilapia (Oreochromis niloticus, itself introduced), the native minnow Rastrineobola argentea (Fig. 1), and the freshwater shrimp Caridina nilotica, all of which expanded dramatically in the absence of competition and predation from haplochromines. These species also provided a prey base for Nile per ...
... tilapia (Oreochromis niloticus, itself introduced), the native minnow Rastrineobola argentea (Fig. 1), and the freshwater shrimp Caridina nilotica, all of which expanded dramatically in the absence of competition and predation from haplochromines. These species also provided a prey base for Nile per ...
Nitrogen in Insects - Arizona State University
... offs was motivated by the apparent weakness of phylogenetic conservation of N content. The first analysis partitioned species into a set of ordinal-level groups, each containing at least one phylogenetically independent contrast between herbivores and predators. These groupings corresponded to a sin ...
... offs was motivated by the apparent weakness of phylogenetic conservation of N content. The first analysis partitioned species into a set of ordinal-level groups, each containing at least one phylogenetically independent contrast between herbivores and predators. These groupings corresponded to a sin ...
Logan et al Oecologia Revised Manuscript Final Format
... Nitrogen stable isotopes provide natural markers that are increasingly used to study food webs and movement patterns (Hobson 1999). The isotopic signatures of organisms reflect the stable isotope ratios of their diets offset by a discrimination factor. Discrimination represents the difference betwee ...
... Nitrogen stable isotopes provide natural markers that are increasingly used to study food webs and movement patterns (Hobson 1999). The isotopic signatures of organisms reflect the stable isotope ratios of their diets offset by a discrimination factor. Discrimination represents the difference betwee ...
Chapters 3,4 and 6: Ecology
... Determines the types of organisms which may exist in that environment. Examples are: A low temperature common to northern latitudes determines in part what species of plants can exist in that area. The amount of oxygen dissolved in a body of water will help determine which species of fish will exist ...
... Determines the types of organisms which may exist in that environment. Examples are: A low temperature common to northern latitudes determines in part what species of plants can exist in that area. The amount of oxygen dissolved in a body of water will help determine which species of fish will exist ...