Impacts of Invasive Species on Food Webs: A Review of Empirical
... involving other species than the invasive and the resident (cascades, exploitative competition, and apparent competition). The complexity of most real food webs makes it difficult to predict how the impacts of an invasive species may propagate more than two steps away from it, as the number of conne ...
... involving other species than the invasive and the resident (cascades, exploitative competition, and apparent competition). The complexity of most real food webs makes it difficult to predict how the impacts of an invasive species may propagate more than two steps away from it, as the number of conne ...
poster michael humboldt nuevo logo
... new regulations were implemented to allow for its recovery. Nevertheless trawl fishing is a non-selective method and affects other species apart from hake. The continued removal of older and larger individuals from a demersal fish community, not only affects the abundance and size structure of the c ...
... new regulations were implemented to allow for its recovery. Nevertheless trawl fishing is a non-selective method and affects other species apart from hake. The continued removal of older and larger individuals from a demersal fish community, not only affects the abundance and size structure of the c ...
A generic approach to integrate biodiversity considerations in
... The practical problems in describing the biodiversity of an area may be overwhelming, in many cases due to lack of data, or else due to the sheer amount of data and the problem of selecting what is relevant information. However, the approach, as presented here, allows for the identification of serio ...
... The practical problems in describing the biodiversity of an area may be overwhelming, in many cases due to lack of data, or else due to the sheer amount of data and the problem of selecting what is relevant information. However, the approach, as presented here, allows for the identification of serio ...
Integrated Pest Management IPM
... susceptible variety and growth stage. 4. All of the above must occur at the same time. ...
... susceptible variety and growth stage. 4. All of the above must occur at the same time. ...
Return of an Icon - Canadian Bison Association
... The dung regulates the humidity inside the burrow, releasing moisture in hot periods, and absorbing it during wet periods. Dung in the burrow reduces the level of carbon dioxide. In one survey of 71 owl pellets, they found the remains of 2484 beetles, 7 sagebrush voles, 3 deer mice and 11 unknown mi ...
... The dung regulates the humidity inside the burrow, releasing moisture in hot periods, and absorbing it during wet periods. Dung in the burrow reduces the level of carbon dioxide. In one survey of 71 owl pellets, they found the remains of 2484 beetles, 7 sagebrush voles, 3 deer mice and 11 unknown mi ...
Community 1 A
... • Early-arriving species and later-arriving species may be linked in one of three processes: – Early arrivals may facilitate appearance of later species by making the environment favorable – They may inhibit establishment of later species – They may tolerate later species but have no impact on thei ...
... • Early-arriving species and later-arriving species may be linked in one of three processes: – Early arrivals may facilitate appearance of later species by making the environment favorable – They may inhibit establishment of later species – They may tolerate later species but have no impact on thei ...
as a PDF
... et al., 2010). However, even less is known on the factors structuring post-metamorphic anuran assemblages; the majority of our understanding comes through studies focused on habitat use or diet (Wells, 2010). An ecomorphological approach to understanding the structure of these assemblages has yet to ...
... et al., 2010). However, even less is known on the factors structuring post-metamorphic anuran assemblages; the majority of our understanding comes through studies focused on habitat use or diet (Wells, 2010). An ecomorphological approach to understanding the structure of these assemblages has yet to ...
Environmental Biology ~ Allan M. Jones ~ 2001
... increasing flexibility within and between institutions is encouraging diversification and especially the facilitation of teaching via modularisation. The latter involves the compartmentalisation of information which is presented in short, concentrated courses that, on the one hand are self contained ...
... increasing flexibility within and between institutions is encouraging diversification and especially the facilitation of teaching via modularisation. The latter involves the compartmentalisation of information which is presented in short, concentrated courses that, on the one hand are self contained ...
Document
... the most important prerequisite condition, since bloomforming cyanobacteria generally become dominant in high-temperature seasons and most species exhibit maximum growth rates at high temperatures (Robarts and Zohary, 1987). If the environmental conditions are suited to the growth of cyanobacteria, ...
... the most important prerequisite condition, since bloomforming cyanobacteria generally become dominant in high-temperature seasons and most species exhibit maximum growth rates at high temperatures (Robarts and Zohary, 1987). If the environmental conditions are suited to the growth of cyanobacteria, ...
mutualisms and facilitation
... local effects (e.g. Verdú & Valiente-Banuet 2008) or organisms at the same trophic level only. Certain discussions of the concept exclude cases in which the partners directly interact, focusing on situations in which one species profits from how another alters the abiotic environment or in which res ...
... local effects (e.g. Verdú & Valiente-Banuet 2008) or organisms at the same trophic level only. Certain discussions of the concept exclude cases in which the partners directly interact, focusing on situations in which one species profits from how another alters the abiotic environment or in which res ...
mechanisms underlying the effects of spiders on pest populations
... enemies, and spiders are sometimes the dominant component. In addition to killing pests by direct attack, spiders cause pest mortality by dislodging them from plants or trapping them in webs. If the pest is distasteful, or if it is the dominant prey type available, spiders may kill more than they co ...
... enemies, and spiders are sometimes the dominant component. In addition to killing pests by direct attack, spiders cause pest mortality by dislodging them from plants or trapping them in webs. If the pest is distasteful, or if it is the dominant prey type available, spiders may kill more than they co ...
Influence of driver ant swarm raids on earthworm prey densities in
... 7.2 m/h (Schöning et al., 2005a). Birds attending the swarm have been observed to capture earthworms trying to escape from the ants (either within or ahead of the swarm raid area), so that the birds’ predatory activities also need to be taken into account when assessing the impact of swarm raids. T ...
... 7.2 m/h (Schöning et al., 2005a). Birds attending the swarm have been observed to capture earthworms trying to escape from the ants (either within or ahead of the swarm raid area), so that the birds’ predatory activities also need to be taken into account when assessing the impact of swarm raids. T ...
The ecology of vertebrate pests and integrated pest management
... pregnancyrates, larger litter sizes, more litters per year, and a higher survival rate of young. Currently, there are no commercial products available to reduce the fertility of rodents although research in this area continues. As part of this life strategy, individuals of most rodent species have s ...
... pregnancyrates, larger litter sizes, more litters per year, and a higher survival rate of young. Currently, there are no commercial products available to reduce the fertility of rodents although research in this area continues. As part of this life strategy, individuals of most rodent species have s ...
Direct effects of elevated temperature on a tri-trophic system
... and Hydrological Institute, SMHI). An increased mean temperature of 20 C during the summer months for this area would be a reasonable expectation following climate change. While, the highest temperature treatment (24 C) will most likely not be relevant in the near future, but may be so for other p ...
... and Hydrological Institute, SMHI). An increased mean temperature of 20 C during the summer months for this area would be a reasonable expectation following climate change. While, the highest temperature treatment (24 C) will most likely not be relevant in the near future, but may be so for other p ...
Australia ) in Varanus gouldii mosaic burning and varanid lizards
... Karlamilyi (Rudall River) National Park in which two Martu communities (Parnngurr and Punmu) are located. Martu foraging data are available from 347 sample days and 4461 focal person-hours of search and pursuit in hunting and collecting (all seasons, June 2000 – September 2010). The hunting returns ...
... Karlamilyi (Rudall River) National Park in which two Martu communities (Parnngurr and Punmu) are located. Martu foraging data are available from 347 sample days and 4461 focal person-hours of search and pursuit in hunting and collecting (all seasons, June 2000 – September 2010). The hunting returns ...
Capacity Building in Biodiversity and Impact Assessment
... only found on Cape Town’s city race course ...
... only found on Cape Town’s city race course ...
soil biota, soil systems, and processes
... to being concerned with numbers of species present in the system. This differentiates it from the concept of species diversity, which is concerned with the identity and distribution of species in a given habitat or region. Soil biodiversity is best considered by focusing on the groups of soil organi ...
... to being concerned with numbers of species present in the system. This differentiates it from the concept of species diversity, which is concerned with the identity and distribution of species in a given habitat or region. Soil biodiversity is best considered by focusing on the groups of soil organi ...
1. Statistics, Primary and Secondary data, Classification and
... Defintion, Limitations and uses of Index numbers. Construction of wholesale price index number and cost of living index number, Constuction of index number by aggregate expenditure method and family budget method using Laspeyres, Paasches and Fishers Formula. ...
... Defintion, Limitations and uses of Index numbers. Construction of wholesale price index number and cost of living index number, Constuction of index number by aggregate expenditure method and family budget method using Laspeyres, Paasches and Fishers Formula. ...
Sea urchin fisheries and potential ecological interactions with a kina
... Babcock et al. have drawn an direct link between the increases in snapper (Pagrus auratus) and crayfish populations and the long-term decline in kina populations in the Leigh Marine Reserve in Northland. It is likely however, that changes in the abundance of kina, and the consequent changes in habit ...
... Babcock et al. have drawn an direct link between the increases in snapper (Pagrus auratus) and crayfish populations and the long-term decline in kina populations in the Leigh Marine Reserve in Northland. It is likely however, that changes in the abundance of kina, and the consequent changes in habit ...
Marine Ecosystems and Nutrient Cycles
... largest ecosystem can be considered the earth as a whole; the planet may be subdivided into terrestrial and marine ecosystems, and each of these may be further subdivided, often on the basis of environmental conditions (e.g., depth, temperature, etc.) , In each ecosystem, there are organisms that pr ...
... largest ecosystem can be considered the earth as a whole; the planet may be subdivided into terrestrial and marine ecosystems, and each of these may be further subdivided, often on the basis of environmental conditions (e.g., depth, temperature, etc.) , In each ecosystem, there are organisms that pr ...
Distributional Ecology of New Guinea Birds
... and its birds have played a special role since its mountain ranges are isolated shall see that the diversity of bird in advancing our understandingof ani- from each other by a i'sea" of unin- species on most Pacific islands is in a mal populations. This role developed habitablelowlands.The numberof ...
... and its birds have played a special role since its mountain ranges are isolated shall see that the diversity of bird in advancing our understandingof ani- from each other by a i'sea" of unin- species on most Pacific islands is in a mal populations. This role developed habitablelowlands.The numberof ...
Growth Rings in the Roots of Temperate Forbs are Robust Annual
... decade (e.g., Dietz and Ullmann, 1997, 1998; Dietz and Fattorini, 2002; Dietz and von Arx, 2005; von Arx and Dietz, 2005). The anatomical basis of annual growth increments (hereafter referred to as “annual rings”) in the roots of forbs is the formation of earlywood vessels with large lumina in sprin ...
... decade (e.g., Dietz and Ullmann, 1997, 1998; Dietz and Fattorini, 2002; Dietz and von Arx, 2005; von Arx and Dietz, 2005). The anatomical basis of annual growth increments (hereafter referred to as “annual rings”) in the roots of forbs is the formation of earlywood vessels with large lumina in sprin ...
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.