6. Salt Marsh Weeds - Tijuana River National Estuarine Research
... What about alkaliweed? I noticed how weedy it can be after a farmer plowed the high marsh-upland transition at San Dieguito Lagoon. Next to the remnant high marsh, the plowed field had developed a broad band of solid alkaliweed. The seeds must have been dormant in the seed bank, ready to germinate w ...
... What about alkaliweed? I noticed how weedy it can be after a farmer plowed the high marsh-upland transition at San Dieguito Lagoon. Next to the remnant high marsh, the plowed field had developed a broad band of solid alkaliweed. The seeds must have been dormant in the seed bank, ready to germinate w ...
Soil and vegetation nutrient response to bison carcasses in Białowie
... open areas traditionally used as dumps for dead animals for hunting purposes. The natural mortality of free-living bison is quite low, 3% on average (Krasiński et al. 1994), and they are occasionally preyed upon by wolves (Je˛drzejewski et al. 2002). Thus, natural bison carcasses are rare and not e ...
... open areas traditionally used as dumps for dead animals for hunting purposes. The natural mortality of free-living bison is quite low, 3% on average (Krasiński et al. 1994), and they are occasionally preyed upon by wolves (Je˛drzejewski et al. 2002). Thus, natural bison carcasses are rare and not e ...
organisms and populations
... They tend to lose body heat very fast when it is cold outside. They have to spend much energy to generate body heat through metabolism. Due to this reason, very small animals are rarely found in Polar Regions. ...
... They tend to lose body heat very fast when it is cold outside. They have to spend much energy to generate body heat through metabolism. Due to this reason, very small animals are rarely found in Polar Regions. ...
Biological diversity, ecosystem stability and economic
... There are two problems. The first is that in a world where the scale of resource use by people is a substantial fraction o f the global scale of resource cycling, the costs of appropriating natural resources should be high. For the most part, these costs are currently too low (see Pearce and Warford ...
... There are two problems. The first is that in a world where the scale of resource use by people is a substantial fraction o f the global scale of resource cycling, the costs of appropriating natural resources should be high. For the most part, these costs are currently too low (see Pearce and Warford ...
Is the role of trophic control larger in a stressed ecosystem?
... that the identification of trophic components wisely corresponds to functional groups and that flow data were correctly collected. However, many systematic problems of data quality and simplification can become of secondary importance when we focus only on differences between similarly described web ...
... that the identification of trophic components wisely corresponds to functional groups and that flow data were correctly collected. However, many systematic problems of data quality and simplification can become of secondary importance when we focus only on differences between similarly described web ...
Spillover of functionally important organisms between managed and
... Although ecological coupling via exchanges of energy and organisms among different habitats can have important impacts on a variety of ecosystem functions (McCoy et al., 2009), the mechanisms that determine how different habitats affect one another are still poorly understood. Examples of interconne ...
... Although ecological coupling via exchanges of energy and organisms among different habitats can have important impacts on a variety of ecosystem functions (McCoy et al., 2009), the mechanisms that determine how different habitats affect one another are still poorly understood. Examples of interconne ...
Generalities in grazing and browsing ecology du Toit, Johan T
... has not previously been formalized for controlling the contingency problem in community ecology. Here we demonstrate the utility of the framework for clarifying generalities in grazing and browsing ecology. Our focus is on animal– plant and animal–animal interactions in terrestrial communities that ...
... has not previously been formalized for controlling the contingency problem in community ecology. Here we demonstrate the utility of the framework for clarifying generalities in grazing and browsing ecology. Our focus is on animal– plant and animal–animal interactions in terrestrial communities that ...
Biodiversity and Ecosystem Services in Agroecosystems
... affects flows of ecosystem services and disservices (or diminution of naturally occurring services) from production landscape to surrounding areas. Services from agriculture include provisioning services (food, fuel, fiber, and biochemicals) as well as carbon sequestration, soil conservation, cultural ...
... affects flows of ecosystem services and disservices (or diminution of naturally occurring services) from production landscape to surrounding areas. Services from agriculture include provisioning services (food, fuel, fiber, and biochemicals) as well as carbon sequestration, soil conservation, cultural ...
CO , nitrogen, and diversity differentially affect seed production of prairie plants 2
... Abstract. Plant species composition and diversity is often influenced by early life history stages; thus, global change could dramatically affect plant community structure by altering seed production. Unfortunately, plant reproductive responses to global change are rarely studied in field settings, ...
... Abstract. Plant species composition and diversity is often influenced by early life history stages; thus, global change could dramatically affect plant community structure by altering seed production. Unfortunately, plant reproductive responses to global change are rarely studied in field settings, ...
FEMS Microbiology Ecology
... tested. In order to study the potential role of rhizobia in natural ecosystems, controlled experiments are required, in which it is possible to manipulate the presence of rhizobia. This is difficult because rhizobia are not amenable to field manipulation, as the bacteria are usually already present ...
... tested. In order to study the potential role of rhizobia in natural ecosystems, controlled experiments are required, in which it is possible to manipulate the presence of rhizobia. This is difficult because rhizobia are not amenable to field manipulation, as the bacteria are usually already present ...
... applying in countries when solving the poverty problem is a national priority [1]. But, what about in developed countries, such as Spain and Portugal, where priorities are quite different and where non-native species are one of the main threats to freshwater ecosystem functioning and biodiversity? [ ...
Asymmetric competition between plant species
... form competitive hierarchies (Ross & Harper 1972; Weiner & Solbrig 1984), it would be expected that in mixtures of species, competition is not equal for all members of the interacting populations. Furthermore, species differ in their ability to capture resources. Watkinson (1985), for example, refer ...
... form competitive hierarchies (Ross & Harper 1972; Weiner & Solbrig 1984), it would be expected that in mixtures of species, competition is not equal for all members of the interacting populations. Furthermore, species differ in their ability to capture resources. Watkinson (1985), for example, refer ...
Plants for Stormwater Design Manual
... deposition and scouring. Kennedy and Krinard (1974) found that tree seedlings were killed in a flood whereas trees at least one year old survived. Other factors that can influence a plant’s resistance to flooding and saturated soil include its age and condition and the timing and duration ...
... deposition and scouring. Kennedy and Krinard (1974) found that tree seedlings were killed in a flood whereas trees at least one year old survived. Other factors that can influence a plant’s resistance to flooding and saturated soil include its age and condition and the timing and duration ...
Food webs on plants - UvA-DARE
... fecundityy and growth rate. When prey supply was not ample but equivalent to that in the release-recapturee experiments, the oviposition rate of predatory bugs on plants with 1000 spiderr mite females was similar to that on plants with 30 thrips larvae, but lower than that onn plants with 150 thrips ...
... fecundityy and growth rate. When prey supply was not ample but equivalent to that in the release-recapturee experiments, the oviposition rate of predatory bugs on plants with 1000 spiderr mite females was similar to that on plants with 30 thrips larvae, but lower than that onn plants with 150 thrips ...
The Nonliving Environment
... 6.1c: Matter is transferred from one organism to another and between organisms and their physical environment. Water, nitrogen, carbon dioxide, and oxygen are examples of substances cycled between the living and nonliving environment. 7.1a: A population consists of all individuals of a species that ...
... 6.1c: Matter is transferred from one organism to another and between organisms and their physical environment. Water, nitrogen, carbon dioxide, and oxygen are examples of substances cycled between the living and nonliving environment. 7.1a: A population consists of all individuals of a species that ...
Whats good for you may be good for me: evidence for
... southern Texas, USA. Now, Whitney et al. provide experimental evidence that many phenotypic traits (ecophysiological, phenological and plant architectural traits) potentially related to drought tolerance differ significantly between introgressed and nonintrogressed populations of the recipient taxon ...
... southern Texas, USA. Now, Whitney et al. provide experimental evidence that many phenotypic traits (ecophysiological, phenological and plant architectural traits) potentially related to drought tolerance differ significantly between introgressed and nonintrogressed populations of the recipient taxon ...
Managing Predator-Prey Systems: Summary Discussion
... controlling predators sometimes meet with fierce resistance from the public. Society demands that wildlife managers take a broader perspective on predator management than focusing solely on enhancing populations of those species preferred for hunting. Accommodations can be made to allow predators t ...
... controlling predators sometimes meet with fierce resistance from the public. Society demands that wildlife managers take a broader perspective on predator management than focusing solely on enhancing populations of those species preferred for hunting. Accommodations can be made to allow predators t ...
Conserving Wildlife in Maine`s Coastal Habitats
... eelgrass beds, while winter flounder and cod use them as nurseries. Waterfowl that feed on eelgrass include American black ducks, Canada geese, and Atlantic brant. Wading birds and shorebirds prey on invertebrates and small fish hidden in the eelgrass jungle. Dense eelgrass beds are often found in a ...
... eelgrass beds, while winter flounder and cod use them as nurseries. Waterfowl that feed on eelgrass include American black ducks, Canada geese, and Atlantic brant. Wading birds and shorebirds prey on invertebrates and small fish hidden in the eelgrass jungle. Dense eelgrass beds are often found in a ...
Interactions among grasses, shrubs, and
... from upper layers, kept this layer dry and reduced water infiltration into deep soil layers. In plots where shrubs were removed, a small reduction in soil water potential of deep soil water was observed, suggesting that grasses may use a portion of the deep soil water. Golluscio et al. (1998) presen ...
... from upper layers, kept this layer dry and reduced water infiltration into deep soil layers. In plots where shrubs were removed, a small reduction in soil water potential of deep soil water was observed, suggesting that grasses may use a portion of the deep soil water. Golluscio et al. (1998) presen ...
Limiting resources and the regulation of diversity in phytoplankton
... variation in cell size among different species and reflects the true contribution of individual species to phytoplankton community composition. We use Simpson's diversity index as it is numerically analogous to resource-competition theory, which predicts that the number of species that can coexist a ...
... variation in cell size among different species and reflects the true contribution of individual species to phytoplankton community composition. We use Simpson's diversity index as it is numerically analogous to resource-competition theory, which predicts that the number of species that can coexist a ...
Seven years of carbon dioxide enrichment, nitrogen
... communities (Koch & Mooney, 1996; Reich et al., 2001a; Reich, 2009). Increasing the availability of mineral nitrogen (N) often increases total plant production but decreases diversity as a few nitrophilic plant species become dominant (Silvertown, 1980; Tilman, 1987). Furthermore, interactions betwe ...
... communities (Koch & Mooney, 1996; Reich et al., 2001a; Reich, 2009). Increasing the availability of mineral nitrogen (N) often increases total plant production but decreases diversity as a few nitrophilic plant species become dominant (Silvertown, 1980; Tilman, 1987). Furthermore, interactions betwe ...