evaluation of the factors that limit Olympia oyster
... associated with symptoms of eutrophication, including elevated nutrient concentrations and turbidity. Oysters were also absent from all sites where water control structures resulted in minimal tidal exchange. Predation and competition did not appear to play a major role in surveyed oyster population ...
... associated with symptoms of eutrophication, including elevated nutrient concentrations and turbidity. Oysters were also absent from all sites where water control structures resulted in minimal tidal exchange. Predation and competition did not appear to play a major role in surveyed oyster population ...
Invertebrate drift in a glacial river and its non
... Petts, 1994). Fishes are typically absent. Food resources are sparse, but include benthic algae and below the tree line allochthonous organic matter (Ward, 1994; Zah & Uehlinger, 2001). This environment contrasts with snowmelt/rainfall streams, particularly in summer (see Ward, 1994). Consequently, ...
... Petts, 1994). Fishes are typically absent. Food resources are sparse, but include benthic algae and below the tree line allochthonous organic matter (Ward, 1994; Zah & Uehlinger, 2001). This environment contrasts with snowmelt/rainfall streams, particularly in summer (see Ward, 1994). Consequently, ...
zooplankton assemblages in sematan river, sematan
... Rotifers can be classified as soft-bodied metazoans of invertebrates and they are having a very short life cycle among other type of plankton. There are only about 100 rotifer species that widely spread are planktonic organism and rotifer life cycles are influenced by temperature, food and photoperi ...
... Rotifers can be classified as soft-bodied metazoans of invertebrates and they are having a very short life cycle among other type of plankton. There are only about 100 rotifer species that widely spread are planktonic organism and rotifer life cycles are influenced by temperature, food and photoperi ...
The Impact of Zooplankton Grazing on Phytoplankton
... daily. Macrozooplankton fed most heavily on algae 5 to 25 µm in size and generally selected dinoflagellates and green algae (6 to 26% of biomass removed per day) over cryptophytes (1 to 8%/day), diatoms (0 to 10%/day) and blue green algae (0 to 6%/day). However, variability in grazing vulnerability ...
... daily. Macrozooplankton fed most heavily on algae 5 to 25 µm in size and generally selected dinoflagellates and green algae (6 to 26% of biomass removed per day) over cryptophytes (1 to 8%/day), diatoms (0 to 10%/day) and blue green algae (0 to 6%/day). However, variability in grazing vulnerability ...
Chapter 11-6 Aquatic Insects: Hemimetabolous
... Plecoptera can use bryophytes in a number of ways. The most obvious is their use as a substrate and shelter from the flowing water. They are especially common there as young instars when the bryophytes can protect these less able swimmers from the flowing water. Many are able to obtain food there, e ...
... Plecoptera can use bryophytes in a number of ways. The most obvious is their use as a substrate and shelter from the flowing water. They are especially common there as young instars when the bryophytes can protect these less able swimmers from the flowing water. Many are able to obtain food there, e ...
7 The Water Column Plankton
... (some ambiguity here, because some groups like dinoflagellates have non-photosynthesizing members) • Zooplankton are animals living as plankton • Mixoplankton are organisms that may function as animals but ingest phytoplankton and maintain the chloroplasts of their food organisms (phytoplankton), an ...
... (some ambiguity here, because some groups like dinoflagellates have non-photosynthesizing members) • Zooplankton are animals living as plankton • Mixoplankton are organisms that may function as animals but ingest phytoplankton and maintain the chloroplasts of their food organisms (phytoplankton), an ...
Estuary Chpt. 1 - Overview of the Kennebec Estuary
... Although it represents only part of a much larger system, the influence of the Kennebec Estuary features prominently in the region’s cultural and environmental history. The complex, shifting interactions between the estuary’s natural systems and its people have shaped a legacy of social expectations ...
... Although it represents only part of a much larger system, the influence of the Kennebec Estuary features prominently in the region’s cultural and environmental history. The complex, shifting interactions between the estuary’s natural systems and its people have shaped a legacy of social expectations ...
Refining dwarf galaxias (Galaxiella pusilla)
... new Corangamite Waterway Strategy. It also provided a re-assessment of important sites identified in previous processes such as a review of Significant Fish Species Protection under Dry Inflow Conditions (Saddlier et. al. 2009) and HERO Significant Fish Project ...
... new Corangamite Waterway Strategy. It also provided a re-assessment of important sites identified in previous processes such as a review of Significant Fish Species Protection under Dry Inflow Conditions (Saddlier et. al. 2009) and HERO Significant Fish Project ...
Coqui frog invasions change invertebrate communities in Hawaii
... handful of species, primarily cane toads (Chaunus marinus), American bullfrogs (Lithobates catesbeianus), and African clawed frogs (Xenopus laevis) (Kraus 2009). These studies show that non-native amphibians reduce prey (Greenlees et al. 2006; Lafferty and Page 1997), reduce predators (Catling et al ...
... handful of species, primarily cane toads (Chaunus marinus), American bullfrogs (Lithobates catesbeianus), and African clawed frogs (Xenopus laevis) (Kraus 2009). These studies show that non-native amphibians reduce prey (Greenlees et al. 2006; Lafferty and Page 1997), reduce predators (Catling et al ...
Community dynamics of ephemeral systems: food web
... Introduction Ephemeral waterbodies are one of the most ubiquitous freshwater features of most terrestrial landscapes. They exist in many forms, such as small puddles, water filled structures of plants, snow-melt pools, depressional wetlands, large saline lakes, and vernal pools. Any natural depress ...
... Introduction Ephemeral waterbodies are one of the most ubiquitous freshwater features of most terrestrial landscapes. They exist in many forms, such as small puddles, water filled structures of plants, snow-melt pools, depressional wetlands, large saline lakes, and vernal pools. Any natural depress ...
Does food web structure affect detrital processing in streams?
... feeding guild of macroinvertebrates consuming leaf litter (Cummins and Klug 1979). Many aquatic insects and crustaceans belong to the shredder functional feeding group and play an important role in streams for the breakdown of leaf litter (Cummins & Klug 1979). Shredders prefer detritus in the form ...
... feeding guild of macroinvertebrates consuming leaf litter (Cummins and Klug 1979). Many aquatic insects and crustaceans belong to the shredder functional feeding group and play an important role in streams for the breakdown of leaf litter (Cummins & Klug 1979). Shredders prefer detritus in the form ...
McIntosh et al. 2004
... patchiness, possibly by allowing the influence of variation in physical characteristics (e.g., flow and substratum) to predominate or by changing grazer microhabitat use. These results support theoretical predictions that factors affecting primary consumer behavior also alter resource heterogeneity. ...
... patchiness, possibly by allowing the influence of variation in physical characteristics (e.g., flow and substratum) to predominate or by changing grazer microhabitat use. These results support theoretical predictions that factors affecting primary consumer behavior also alter resource heterogeneity. ...
Slide 1
... Matter and energy cycle through the living and nonliving world. Organisms rely on this matter and energy cycling to survive. Animals are interconnected in a complex web of life. Changes on one part of the web have will effect other parts of the web and the stability of the entire ecosystem. Ecosyste ...
... Matter and energy cycle through the living and nonliving world. Organisms rely on this matter and energy cycling to survive. Animals are interconnected in a complex web of life. Changes on one part of the web have will effect other parts of the web and the stability of the entire ecosystem. Ecosyste ...
7th gd Ecosystems And Biomes
... Food Chains and Food Webs To sustain any ecosystem, energy must be transferred through the many organisms that live in the ecosystem. The movement of energy through an ecosystem can be shown in diagrams known as food chains and food webs. Food chain —shows a series of events in which one organism ea ...
... Food Chains and Food Webs To sustain any ecosystem, energy must be transferred through the many organisms that live in the ecosystem. The movement of energy through an ecosystem can be shown in diagrams known as food chains and food webs. Food chain —shows a series of events in which one organism ea ...
Freshwater Algae: Identification and Use as Bioindicators
... Biovolume values are based on a sphere (volume = 4 /3 π r3 ). Table reproduced from Sigee, 2004. ...
... Biovolume values are based on a sphere (volume = 4 /3 π r3 ). Table reproduced from Sigee, 2004. ...
Abundance matters: a Weld experiment testing the more individuals
... from an increase in the abundance of rare taxa in higher resource treatments (Kneitel and Miller 2002), a result consistent with the MIH. Current ideas about the relationship between diversity and productivity often focus on plant communities, where net primary production is the obvious measure of p ...
... from an increase in the abundance of rare taxa in higher resource treatments (Kneitel and Miller 2002), a result consistent with the MIH. Current ideas about the relationship between diversity and productivity often focus on plant communities, where net primary production is the obvious measure of p ...
Volume 2, Chapter 4-2 - Digital Commons @ Michigan Tech
... and other topics and provided a memorable experience that endeared the flatworms to us for life. Most of the turbellaria (Figure 1), formerly a class within the phylum Platyhelminthes, are nocturnal and free-living, and it is among this group that one finds a small number of bryophyte-dwellers. The ...
... and other topics and provided a memorable experience that endeared the flatworms to us for life. Most of the turbellaria (Figure 1), formerly a class within the phylum Platyhelminthes, are nocturnal and free-living, and it is among this group that one finds a small number of bryophyte-dwellers. The ...
Detritus, trophic dynamics and biodiversity
... wood, and the actions of soluble organic acids leached from decaying detritus on soil parent material and organic matter. In each case, the chemical quality of the initial input of detritus and its decomposition products, combined with physical mixing of the detritus by organisms, influence nutrient ...
... wood, and the actions of soluble organic acids leached from decaying detritus on soil parent material and organic matter. In each case, the chemical quality of the initial input of detritus and its decomposition products, combined with physical mixing of the detritus by organisms, influence nutrient ...
Habitat Selection Among Fishes and Shrimp in the Pelagic
... predictions, which suggest reduction of habitat should decrease species number and alter community composition (Hill and Curran, 2003). Processes affecting dispersal and mitigation of invertebrates (and vertebrates) in fragmented landscapes are no doubt complex and await further testing in the field ...
... predictions, which suggest reduction of habitat should decrease species number and alter community composition (Hill and Curran, 2003). Processes affecting dispersal and mitigation of invertebrates (and vertebrates) in fragmented landscapes are no doubt complex and await further testing in the field ...
The New Mexico Association of Counties Wildfire Risk Reduction
... and candidate species and the importance of minimizing impacts to individuals and their habitats Equipment staging areas and fueling areas should be located outside of listed species habitats, and preferably in locations that are already disturbed. The potential for indirect effects to listed specie ...
... and candidate species and the importance of minimizing impacts to individuals and their habitats Equipment staging areas and fueling areas should be located outside of listed species habitats, and preferably in locations that are already disturbed. The potential for indirect effects to listed specie ...
The Dynamics of Location: Influence of Predation by
... Every freshwater organism chooses a location based on a balance between the chemical and physical characteristics of the body of water they inhabit with its food concentrations and areas of predation risk. All of these components of a body of water can be dynamic, and may fluctuate over time. The pr ...
... Every freshwater organism chooses a location based on a balance between the chemical and physical characteristics of the body of water they inhabit with its food concentrations and areas of predation risk. All of these components of a body of water can be dynamic, and may fluctuate over time. The pr ...
Biome A Biome B
... Earth. These areas receive less solar energy from the sun and are therefore subject to low surface temperatures, allowing ice caps to form. This area averages less than 10 inches of precipitation, so technically it is a desert! Conditions in this biome are too extreme to sustain life. Even bacteria, ...
... Earth. These areas receive less solar energy from the sun and are therefore subject to low surface temperatures, allowing ice caps to form. This area averages less than 10 inches of precipitation, so technically it is a desert! Conditions in this biome are too extreme to sustain life. Even bacteria, ...
Biotic and abiotic factors affecting distributions of megafauna in
... nautilei occur as 2 different color morphotypes that can be distinguished in the mosaics. Prior to this study, it was not known whether the distribution of the different color morphotypes was correlated with differences in microhabitats. In this study, we used new data sets collected from 7 diffuse ...
... nautilei occur as 2 different color morphotypes that can be distinguished in the mosaics. Prior to this study, it was not known whether the distribution of the different color morphotypes was correlated with differences in microhabitats. In this study, we used new data sets collected from 7 diffuse ...
Living Things
... data from two locations. The graph shows the monthly average temperatures in the two locations. The total yearly precipitation in Location A is 250 cm. In Location B, the total yearly precipitation is 14 cm. ...
... data from two locations. The graph shows the monthly average temperatures in the two locations. The total yearly precipitation in Location A is 250 cm. In Location B, the total yearly precipitation is 14 cm. ...
River ecosystem
The ecosystem of a river is the river viewed as a system operating in its natural environment, and includes biotic (living) interactions amongst plants, animals and micro-organisms, as well as abiotic (nonliving) physical and chemical interactions.River ecosystems are prime examples of lotic ecosystems. Lotic refers to flowing water, from the Latin lotus, washed. Lotic waters range from springs only a few centimeters wide to major rivers kilometers in width. Much of this article applies to lotic ecosystems in general, including related lotic systems such as streams and springs. Lotic ecosystems can be contrasted with lentic ecosystems, which involve relatively still terrestrial waters such as lakes and ponds. Together, these two fields form the more general study area of freshwater or aquatic ecology. The following unifying characteristics make the ecology of running waters unique from that of other aquatic habitats. Flow is unidirectional. There is a state of continuous physical change. There is a high degree of spatial and temporal heterogeneity at all scales (microhabitats). Variability between lotic systems is quite high. The biota is specialized to live with flow conditions.↑ ↑ ↑ ↑