Macrophytes shape trophic niche variation among generalist fishes
... role in ecosystems. Generalists can, for instance, regulate the abundance, composition and niche use of organisms at lower and higher trophic levels and also integrate spatially distinct habitats and food-web compartments [2], thereby affecting the structure and stability of food webs [3,4]. General ...
... role in ecosystems. Generalists can, for instance, regulate the abundance, composition and niche use of organisms at lower and higher trophic levels and also integrate spatially distinct habitats and food-web compartments [2], thereby affecting the structure and stability of food webs [3,4]. General ...
pdf file - UNM Biology
... the magnitude of indirect pathways may fluctuate over time, because each indirect pathway involves at least one intervening species that may be influenced by extrinsic environmental variation. The granivore-dominated desert rodent communities of southwestern North America have served as a model syst ...
... the magnitude of indirect pathways may fluctuate over time, because each indirect pathway involves at least one intervening species that may be influenced by extrinsic environmental variation. The granivore-dominated desert rodent communities of southwestern North America have served as a model syst ...
Self-limitation as an explanation for species` relative abundances
... Utah State University, 2013 Major Professor: S. K. Morgan Ernest Department: Biology Ecological theories often hinge on species interactions, or how the species in an area “see” other species with whom they have to share food and space. Despite the contributions theoretical coexistence models have m ...
... Utah State University, 2013 Major Professor: S. K. Morgan Ernest Department: Biology Ecological theories often hinge on species interactions, or how the species in an area “see” other species with whom they have to share food and space. Despite the contributions theoretical coexistence models have m ...
A0708 - ICES
... organic nutrients produced by autotrophs (phytoplankton exudation) and heterotrophs (recycling). The food-web use of dissolved resources is quite specialised, because specific metabolic rates (i.e. rates per unit biomass or size) are generally a direct function of size and surface to volume ratio. G ...
... organic nutrients produced by autotrophs (phytoplankton exudation) and heterotrophs (recycling). The food-web use of dissolved resources is quite specialised, because specific metabolic rates (i.e. rates per unit biomass or size) are generally a direct function of size and surface to volume ratio. G ...
INVASIVE BARNACLE FouLINg oN AN ENDEMIC BuRRowINg CRAB
... (t abundance = -0.65, df = 67, p > 0.05, t size = -0.32, df = 192, p > 0.05). The totality of the epibionts was observed on the dorsal and lateral surfaces of the crab, suggesting that the ventral surface is not suitable for barnacle recruitment and/or survival. The dorsal surface is relatively more ...
... (t abundance = -0.65, df = 67, p > 0.05, t size = -0.32, df = 192, p > 0.05). The totality of the epibionts was observed on the dorsal and lateral surfaces of the crab, suggesting that the ventral surface is not suitable for barnacle recruitment and/or survival. The dorsal surface is relatively more ...
Uso de la facilitación y plantas nodriza como técnica de reforestación
... particular in relation to shade intensity and rainfall interception. The location of targets ...
... particular in relation to shade intensity and rainfall interception. The location of targets ...
Conservation Through Management – Cut Wood as Substrate for
... been enclosed for three seasons (1995, 1997, 2000, or 1996, 1998, 2001). While the experimental design had the advantage of following specific stumps over a period of time, there were some drawbacks. Firstly, biannual enclosing substantially modified natural patterns of succession as access by egg-l ...
... been enclosed for three seasons (1995, 1997, 2000, or 1996, 1998, 2001). While the experimental design had the advantage of following specific stumps over a period of time, there were some drawbacks. Firstly, biannual enclosing substantially modified natural patterns of succession as access by egg-l ...
Factors driving variation in movement rate and seasonality of
... several days were considered small enough not to bias the movement analyses (Johnson and Gillingham 2008). All GPS locations were screened for large positional outliers. Outliers were defined as locations where movement between 2 successive GPS locations exceeded 30 km/h and the angle of the erroneo ...
... several days were considered small enough not to bias the movement analyses (Johnson and Gillingham 2008). All GPS locations were screened for large positional outliers. Outliers were defined as locations where movement between 2 successive GPS locations exceeded 30 km/h and the angle of the erroneo ...
Grass Growth and Response to Grazing no. 6.108 Quick Facts
... midsummer, so sufficient leafy material should remain after grazing to maintain carbohydrate levels within the plant. Grazing during the fall and winter periods, after plant growth is complete and plants are dormant, can be much heavier than at other periods of the year. This old material is of litt ...
... midsummer, so sufficient leafy material should remain after grazing to maintain carbohydrate levels within the plant. Grazing during the fall and winter periods, after plant growth is complete and plants are dormant, can be much heavier than at other periods of the year. This old material is of litt ...
Review of harvest incentives to control invasive species
... support ecosystem and natural resource management while simultaneously boosting economic development and environmental awareness. However, if used incorrectly, negative consequences such as further spread can occur. Success depends on interactions between the species, its invasive range, and socioec ...
... support ecosystem and natural resource management while simultaneously boosting economic development and environmental awareness. However, if used incorrectly, negative consequences such as further spread can occur. Success depends on interactions between the species, its invasive range, and socioec ...
predicting coexistence in species with continuous ontogenetic niche
... size. When both species shift their niches with size, but each is a better competitor on resources ...
... size. When both species shift their niches with size, but each is a better competitor on resources ...
Competitive strategies of soft corals (Coelenterata
... ABSTRACT. Interactions were observed in the field between neighboring colonies of the alcyonacean octocoral Sinularia flexibilis (Quoy & Gaimard) a n d Sinularia sp., as well as between Sarcophyton glaucum (Quoy & Gaimard) and Sinularia sp. Visible effects observed included growth modification, stun ...
... ABSTRACT. Interactions were observed in the field between neighboring colonies of the alcyonacean octocoral Sinularia flexibilis (Quoy & Gaimard) a n d Sinularia sp., as well as between Sarcophyton glaucum (Quoy & Gaimard) and Sinularia sp. Visible effects observed included growth modification, stun ...
C.V. - The Patrick Lab
... watersheds. Chesapeake Bay Modeling Symposium, Annapolis, MD *Patrick, C.J. (2014) Aquatic community ecology at multiple spatial scales. ECODAS Reunion Meeting. Portland, Oregon Patrick, C.J., D.E.,Weller, & M.N. Williams (2014) Fluctuations in an underwater garden: Linking year-to-year variation in ...
... watersheds. Chesapeake Bay Modeling Symposium, Annapolis, MD *Patrick, C.J. (2014) Aquatic community ecology at multiple spatial scales. ECODAS Reunion Meeting. Portland, Oregon Patrick, C.J., D.E.,Weller, & M.N. Williams (2014) Fluctuations in an underwater garden: Linking year-to-year variation in ...
Evo-devo and constraints on selection
... Developmental bias, or genetic channeling, can influence the tempo and direction of evolution and, thus, become reflected in patterns of biodiversity. Twenty years ago, this notion rested on armchair descriptions of potential constraints on evolution. Now, a broad evodevo approach involving both evo ...
... Developmental bias, or genetic channeling, can influence the tempo and direction of evolution and, thus, become reflected in patterns of biodiversity. Twenty years ago, this notion rested on armchair descriptions of potential constraints on evolution. Now, a broad evodevo approach involving both evo ...
Factors Affecting the Social Behaviour of Crustaceans Living
... predicting the social behaviour of crustacean symbionts (Fig. 3A). This relationship was significantly smaller in species that inhabited their hosts in unstructured aggregations than in those that lived as single individuals on their hosts (one-way ANOVA, F3/7o= 3.5, P=0.02), but no other significan ...
... predicting the social behaviour of crustacean symbionts (Fig. 3A). This relationship was significantly smaller in species that inhabited their hosts in unstructured aggregations than in those that lived as single individuals on their hosts (one-way ANOVA, F3/7o= 3.5, P=0.02), but no other significan ...
Synchronous dynamics of zooplankton competitors prevail in
... signature of competition may be entirely obscured by the synchronizing effect of ‘good’ versus ‘bad’ years (e.g. drought versus wet), even if it is an important driver of species’ relative fitness and persistence [22]. Furthermore, it has been shown that embedding competitors in a food web context c ...
... signature of competition may be entirely obscured by the synchronizing effect of ‘good’ versus ‘bad’ years (e.g. drought versus wet), even if it is an important driver of species’ relative fitness and persistence [22]. Furthermore, it has been shown that embedding competitors in a food web context c ...
what is causing the northern fur seal decline?
... however, factors responsible for the remaining 30% of the decline in that period and that have caused the population to continue to fall since then remain in question (York and Hartley 1981, Trites and Larkin 1989). There is evidence that emigration alone could not cause the magnitude of the decline ...
... however, factors responsible for the remaining 30% of the decline in that period and that have caused the population to continue to fall since then remain in question (York and Hartley 1981, Trites and Larkin 1989). There is evidence that emigration alone could not cause the magnitude of the decline ...
Tradeoffs, competition, and coexistence in eastern deciduous forest
... Similarly, tradeoffs (i.e. inverse relationships between functional traits among organisms) might also promote segregation among species (Tilman 1994; McPeek et al. ...
... Similarly, tradeoffs (i.e. inverse relationships between functional traits among organisms) might also promote segregation among species (Tilman 1994; McPeek et al. ...
Ch 26
... traits that make them well adapted to their environment – These organisms pass these inherited traits on to as many healthy offspring as possible – If environmental resistance is reduced, populations can grow extremely rapidly ...
... traits that make them well adapted to their environment – These organisms pass these inherited traits on to as many healthy offspring as possible – If environmental resistance is reduced, populations can grow extremely rapidly ...
Disturbance, Scale, and Boundary in Wilderness
... to the boreal forest (up to 0.3 m per year). These values are 5-10 times greater than the height growth rates of shade tolerant species in the same ecosystems. Species richness also varies along the latitudinal gradient. The consequence is that while all three areas have disturbance-dependent “fast ...
... to the boreal forest (up to 0.3 m per year). These values are 5-10 times greater than the height growth rates of shade tolerant species in the same ecosystems. Species richness also varies along the latitudinal gradient. The consequence is that while all three areas have disturbance-dependent “fast ...
Dinger EC, Hendrickson DA, Winsborough BM, Marks JC (2006)
... can disrupt microbial mats supports this hypothesis (Garrett, 1970), but it is principally based on the temporal correlation in the fossil record between metazoan diversification and stromatolite decline, along with observations that most modern stromatolites occur in ‘‘extreme’’ environments that li ...
... can disrupt microbial mats supports this hypothesis (Garrett, 1970), but it is principally based on the temporal correlation in the fossil record between metazoan diversification and stromatolite decline, along with observations that most modern stromatolites occur in ‘‘extreme’’ environments that li ...
Effects of patch attributes, barriers, and distance between patches
... as patch size and distance between patches, into their metapopulation model for the Glanville fritillary butterfly (Melitaea cinxia). They found that this complex model did not perform much better than a basic model with only patch size and distance between patches. Likewise, for the forest carabid ...
... as patch size and distance between patches, into their metapopulation model for the Glanville fritillary butterfly (Melitaea cinxia). They found that this complex model did not perform much better than a basic model with only patch size and distance between patches. Likewise, for the forest carabid ...
Theoretical ecology
Theoretical ecology is the scientific discipline devoted to the study of ecological systems using theoretical methods such as simple conceptual models, mathematical models, computational simulations, and advanced data analysis. Effective models improve understanding of the natural world by revealing how the dynamics of species populations are often based on fundamental biological conditions and processes. Further, the field aims to unify a diverse range of empirical observations by assuming that common, mechanistic processes generate observable phenomena across species and ecological environments. Based on biologically realistic assumptions, theoretical ecologists are able to uncover novel, non-intuitive insights about natural processes. Theoretical results are often verified by empirical and observational studies, revealing the power of theoretical methods in both predicting and understanding the noisy, diverse biological world.The field is broad and includes foundations in applied mathematics, computer science, biology, statistical physics, genetics, chemistry, evolution, and conservation biology. Theoretical ecology aims to explain a diverse range of phenomena in the life sciences, such as population growth and dynamics, fisheries, competition, evolutionary theory, epidemiology, animal behavior and group dynamics, food webs, ecosystems, spatial ecology, and the effects of climate change.Theoretical ecology has further benefited from the advent of fast computing power, allowing the analysis and visualization of large-scale computational simulations of ecological phenomena. Importantly, these modern tools provide quantitative predictions about the effects of human induced environmental change on a diverse variety of ecological phenomena, such as: species invasions, climate change, the effect of fishing and hunting on food network stability, and the global carbon cycle.