ABSTRACT Title of Dissertation: ECOLOGICAL DYNAMICS OF MACROLEPIDOPTERA
... species at spatial scales from individual trees to the landscape. I used a spatially explicit, nested sampling design to document relative contributions of each scale to the landscape diversity using additive diversity partitioning, and to ask at multiple scales whether the vegetation context of the ...
... species at spatial scales from individual trees to the landscape. I used a spatially explicit, nested sampling design to document relative contributions of each scale to the landscape diversity using additive diversity partitioning, and to ask at multiple scales whether the vegetation context of the ...
Toro, H. "Pollination of Prosopis tamarugo in the Atacama Desert"
... Transportation of pollen is greater in spring than in the rest of the year. The amount of highest nectar foraging seems to be related to water shortage. Nectar is widely used, besides for other metabolic functions, in thermo-regulation of individuals and colonies. Nevertheless, data published by Leó ...
... Transportation of pollen is greater in spring than in the rest of the year. The amount of highest nectar foraging seems to be related to water shortage. Nectar is widely used, besides for other metabolic functions, in thermo-regulation of individuals and colonies. Nevertheless, data published by Leó ...
The habitat of Salpa fusiformis in the California current a
... alike than swarm and nonswarm ones. However, the variability of the similarity indices within each category is high and the means of the various conditions differ by as much as 5%. Although no large-scale diffcrcnces in the diatom assemblages found with S. fusiformis can be attributed to the factors ...
... alike than swarm and nonswarm ones. However, the variability of the similarity indices within each category is high and the means of the various conditions differ by as much as 5%. Although no large-scale diffcrcnces in the diatom assemblages found with S. fusiformis can be attributed to the factors ...
Full text in pdf format
... habitat and thereby have strong effects on biodiversity, e.g. sea grasses, kelps, coral reefs and bivalve beds. Mechanisms whereby these habitat-modifying and forming species influence the marine communities can be divided into 2 groups based on physical structure or biological activity. The common ...
... habitat and thereby have strong effects on biodiversity, e.g. sea grasses, kelps, coral reefs and bivalve beds. Mechanisms whereby these habitat-modifying and forming species influence the marine communities can be divided into 2 groups based on physical structure or biological activity. The common ...
video slide - Manchester Township School District
... taken the following year indicates how rapidly the community began to recover. A variety of herbaceous plants, different from those in the former forest, cover the ground. ...
... taken the following year indicates how rapidly the community began to recover. A variety of herbaceous plants, different from those in the former forest, cover the ground. ...
Population Dynamics of Pathogens with Multiple Host Species
... changes in the relative intensity of within- versus betweenspecies transmission. I explicitly assume rates of betweenspecies transmission are lower than rates of within-species transmission; this largely reflects the ecological assumption that species tend to have more interactions with individuals ...
... changes in the relative intensity of within- versus betweenspecies transmission. I explicitly assume rates of betweenspecies transmission are lower than rates of within-species transmission; this largely reflects the ecological assumption that species tend to have more interactions with individuals ...
Seasonal species interactions minimize the impact of species
... in the given system when subject to perturbations in species biomass. Following Case and Casten (1979), the dynamical system of Eq. 1 does not have alternative stable states under a very large range of assumptions on its parameter values. It has been shown that for such dynamical systems, we can con ...
... in the given system when subject to perturbations in species biomass. Following Case and Casten (1979), the dynamical system of Eq. 1 does not have alternative stable states under a very large range of assumptions on its parameter values. It has been shown that for such dynamical systems, we can con ...
NEWS
... humans, as disability adjusted life years approximating 10.5 million. Ascaris larvae develop in host parenteral tissues, and the resultant pathology has been condemnation. Ascariasis, despite its staggering global prevalence and the sheer numbers of people it infects, remain ...
... humans, as disability adjusted life years approximating 10.5 million. Ascaris larvae develop in host parenteral tissues, and the resultant pathology has been condemnation. Ascariasis, despite its staggering global prevalence and the sheer numbers of people it infects, remain ...
ecosystem - UNL Entomology
... ecosystem can characterized by whether they benefit, harm, or leave no impression on the organisms involved. Predation and parasitism are both positive-negative relationships, where either one individual or one population of individuals benefits at the detriment of the other individual or population ...
... ecosystem can characterized by whether they benefit, harm, or leave no impression on the organisms involved. Predation and parasitism are both positive-negative relationships, where either one individual or one population of individuals benefits at the detriment of the other individual or population ...
Response of macroarthropod assemblages to the loss
... coarse woody debris, twigs, and leaves after the trees have died in place versus essentially instantaneous removal of boles and large limbs leaving only small branches, twigs, and leaves atop soil compacted by heavy machinery— should have profound consequences for species dependent on hemlock’s diff ...
... coarse woody debris, twigs, and leaves after the trees have died in place versus essentially instantaneous removal of boles and large limbs leaving only small branches, twigs, and leaves atop soil compacted by heavy machinery— should have profound consequences for species dependent on hemlock’s diff ...
Chapter 1 Art Slides
... are less fit than “single form” offspring, the population is adapting in one other way: Individuals prefer to mate with others of the same color pattern. ...
... are less fit than “single form” offspring, the population is adapting in one other way: Individuals prefer to mate with others of the same color pattern. ...
PCA – A Powerful Method for Analyze Ecological Niches
... PCA and Hierarchical Ascendant Classification to evaluate environmental data, on the one hand, and human and dog population density data, on the other, in order to detect possible ranking of regions differently threatened by leishmaniasis. Niche differentiation and partitioning is an ecological issu ...
... PCA and Hierarchical Ascendant Classification to evaluate environmental data, on the one hand, and human and dog population density data, on the other, in order to detect possible ranking of regions differently threatened by leishmaniasis. Niche differentiation and partitioning is an ecological issu ...
Dung beetle assemblages on tropical land
... The species–area curve has frequently been used to describe the decrease in species richness in habitat fragments. The typical observed pattern is a species–area relationship (SAR) (Arrhenius, 1921; Gleason, 1922) based on the log–log model (log S = c + z log A, where S is the number of species, A i ...
... The species–area curve has frequently been used to describe the decrease in species richness in habitat fragments. The typical observed pattern is a species–area relationship (SAR) (Arrhenius, 1921; Gleason, 1922) based on the log–log model (log S = c + z log A, where S is the number of species, A i ...
Are there general laws in parasite community - MiVEGEC
... parasite species, and between these species and their host environment (see Kennedy 1975; Cheng 1986; Esch and Fernandez 1993; Combes 1995; Bush et al. 2001). Another aspect is the strong research effort made over the past decades on very untidy small-scale studies, which do not take a strongly quan ...
... parasite species, and between these species and their host environment (see Kennedy 1975; Cheng 1986; Esch and Fernandez 1993; Combes 1995; Bush et al. 2001). Another aspect is the strong research effort made over the past decades on very untidy small-scale studies, which do not take a strongly quan ...
CHAPTER III: Native and nonnative phylogenetically paired plant
... are moved unintentionally, as hitchhikers on plants, animals, produce, packaging crates and material, or transportation vessels (Mack 2003, Lockwood et al. 2007). These species that have been transported by humans across fundamental geographic barriers are considered “nonnative” to their new range ( ...
... are moved unintentionally, as hitchhikers on plants, animals, produce, packaging crates and material, or transportation vessels (Mack 2003, Lockwood et al. 2007). These species that have been transported by humans across fundamental geographic barriers are considered “nonnative” to their new range ( ...
FOOD WEBS
... it is a classic—something to be appreciated by those who study history and the origin of ideas—and that the lessons it teaches may yield insights into present science. To those who read this reprint with history in mind I wish only the best. It is not my reason for this reprint’s existence. In the t ...
... it is a classic—something to be appreciated by those who study history and the origin of ideas—and that the lessons it teaches may yield insights into present science. To those who read this reprint with history in mind I wish only the best. It is not my reason for this reprint’s existence. In the t ...
The Ecology of Invasions and The Invasions of Ecology
... from the initial condition and the internal dynamic.”xvii Open technological systems, on the other hand, are unable to account for external factors, and are therefore vulnerable to the influences of those “environmental systems” that cannot be adequately dealt with by any available technological ca ...
... from the initial condition and the internal dynamic.”xvii Open technological systems, on the other hand, are unable to account for external factors, and are therefore vulnerable to the influences of those “environmental systems” that cannot be adequately dealt with by any available technological ca ...
PDF
... consider risks that result from the uncertainty of profits and provide an optimal strategy for marine species. Implementing the portfolio approach requires not only economic and ecological knowledge, but also administration rules such as those embodied in New Zealand’s quota management system (QMS). ...
... consider risks that result from the uncertainty of profits and provide an optimal strategy for marine species. Implementing the portfolio approach requires not only economic and ecological knowledge, but also administration rules such as those embodied in New Zealand’s quota management system (QMS). ...
Functional traits of woody plants: correspondence of species
... field grown adult plants for a wide range of functional leaf and stem traits. It employs data for 90 diverse woody and semiwoody species in a temperate British and a (sub)Mediterranean Spanish flora, all collected according to a strict protocol. For 12 out of 14 leaf and stem traits we found signifi ...
... field grown adult plants for a wide range of functional leaf and stem traits. It employs data for 90 diverse woody and semiwoody species in a temperate British and a (sub)Mediterranean Spanish flora, all collected according to a strict protocol. For 12 out of 14 leaf and stem traits we found signifi ...
05. Not from here - Savanna Explorer
... wetlands, and the value placed on waterfowl as a food resource by Aboriginal people, the sowing of improved pastures is inappropriate and techniques need to be developed to revegetate wetlands with native species. These species are included by Humphries et. al. 1991 as some of ‘top’ environmental ...
... wetlands, and the value placed on waterfowl as a food resource by Aboriginal people, the sowing of improved pastures is inappropriate and techniques need to be developed to revegetate wetlands with native species. These species are included by Humphries et. al. 1991 as some of ‘top’ environmental ...
3 - ICFCST
... In this area, it has been retained plots of oak forests established beginning with the middle of XVII century. The age of Quercus robur is evaluated as reaching no less than 300 years. These forest plots have a multistory structure and a wide diversity of plant species. Outbreaks of Porthetria dispa ...
... In this area, it has been retained plots of oak forests established beginning with the middle of XVII century. The age of Quercus robur is evaluated as reaching no less than 300 years. These forest plots have a multistory structure and a wide diversity of plant species. Outbreaks of Porthetria dispa ...
Review of the NSW Threatened Species Priorities Action Statement
... progress or outcomes of actions. Many actions had no follow-up monitoring. Where monitoring did occur, results were not captured in the database. It is therefore difficult to determine the extent to which PAS actions have produced successful outcomes for species. 3. Many threatened species (30%) re ...
... progress or outcomes of actions. Many actions had no follow-up monitoring. Where monitoring did occur, results were not captured in the database. It is therefore difficult to determine the extent to which PAS actions have produced successful outcomes for species. 3. Many threatened species (30%) re ...
Evolutionary determinants of morphological polymorphism
... the most extreme members of discrete social insect castes (Wilson 1975). Moreover, the number and frequency of different types of polymorphs can vary from colony to colony both within and among species. The various types of polymorphs differ from autozooids by giving up one or more basic tasks to sp ...
... the most extreme members of discrete social insect castes (Wilson 1975). Moreover, the number and frequency of different types of polymorphs can vary from colony to colony both within and among species. The various types of polymorphs differ from autozooids by giving up one or more basic tasks to sp ...
The Importance of Motivation, Weapons, and Foul Odors in Driving
... Abstract. Encounter competition is interference competition in which animals directly contend for resources. Ecological theory predicts the trait that determines the resource holding potential (RHP), and hence the winner of encounter competition, is most often body size or mass. The difficulties of ...
... Abstract. Encounter competition is interference competition in which animals directly contend for resources. Ecological theory predicts the trait that determines the resource holding potential (RHP), and hence the winner of encounter competition, is most often body size or mass. The difficulties of ...
Exotic plant invasions to the mediterranean region of Chile: causes
... introductions are unprecedented in history, and they are far from being under control (Williamson 1996). The existing evidence suggests that greater changes in global diversity can be expected if species introductions are not controlled, especially in the species-rich mediterranean-type regions of t ...
... introductions are unprecedented in history, and they are far from being under control (Williamson 1996). The existing evidence suggests that greater changes in global diversity can be expected if species introductions are not controlled, especially in the species-rich mediterranean-type regions of t ...
Introduced species
An introduced, alien, exotic, non-indigenous, or non-native species, or simply an introduction, is a species living outside its native distributional range, which has arrived there by human activity, either deliberate or accidental. Non-native species can have various effects on the local ecosystem. Introduced species that become established and spread beyond the place of introduction are called invasive species. Some have a negative effect on a local ecosystem. Some introduced species may have no negative effect or only minor impact. Some species have been introduced intentionally to combat pests. They are called biocontrols and may be regarded as beneficial as an alternative to pesticides in agriculture for example. In some instances the potential for being beneficial or detrimental in the long run remains unknown. A list of some introduced species is given in a separate article.The effects of introduced species on natural environments have gained much scrutiny from scientists, governments, farmers and others.