size-selective harvesting alters life histories of a temperate sex
... sex ratio. When a population contains few individuals of the secondary sex or has a sex ratio skewed severely from its optimum, sex change can occur at smaller sizes and younger ages. Because fisheries often target the largest individuals in a population (which are predominately one sex for sequentia ...
... sex ratio. When a population contains few individuals of the secondary sex or has a sex ratio skewed severely from its optimum, sex change can occur at smaller sizes and younger ages. Because fisheries often target the largest individuals in a population (which are predominately one sex for sequentia ...
Changing Gears—Abiotic vs. Biotic Factors
... Today’s Objectives By the end of class today, you will be able to: distinguish the difference between biotic and abiotic factors and the role they play in environmental communities to identify the 4 mains parts of energy flow through an ecosystem ...
... Today’s Objectives By the end of class today, you will be able to: distinguish the difference between biotic and abiotic factors and the role they play in environmental communities to identify the 4 mains parts of energy flow through an ecosystem ...
Restoration in the Rainshadow - SER
... This paper describes the role of local knowledge and ethnoecological methods in the restoration of Garry oak ecosystems in southwestern British Columbia. Information resulting from recent ethnoecological research on camas (Camassia spp.) on southern Vancouver Island provides the inspiration for a br ...
... This paper describes the role of local knowledge and ethnoecological methods in the restoration of Garry oak ecosystems in southwestern British Columbia. Information resulting from recent ethnoecological research on camas (Camassia spp.) on southern Vancouver Island provides the inspiration for a br ...
Birds defend trees from herbivores in a Neotropical forest canopy
... period, host tree species, and all two-way interactions. All three-way interactions were nonsignificant and were removed from the models. The random effect in the model was the host tree nested within host species. We analyzed additional models that combined canopy and understory response variables ...
... period, host tree species, and all two-way interactions. All three-way interactions were nonsignificant and were removed from the models. The random effect in the model was the host tree nested within host species. We analyzed additional models that combined canopy and understory response variables ...
bc protected areas research forum
... models used to represent complex ecosystems suffer because of imprecision, uncertainty and sparsity common to ecological data. Additionally, these traditional systems can only incorporate that expert knowledge which ...
... models used to represent complex ecosystems suffer because of imprecision, uncertainty and sparsity common to ecological data. Additionally, these traditional systems can only incorporate that expert knowledge which ...
Nutrient enrichment homogenizes lake benthic assemblages at local and regional scales I D
... Abstract. The compositional heterogeneity of biotic assemblages among sites, or bdiversity, regulates the relationship between local and regional species diversity across scales. Recent work has suggested that increased harshness of environmental conditions tends to reduce b-diversity by decreasing ...
... Abstract. The compositional heterogeneity of biotic assemblages among sites, or bdiversity, regulates the relationship between local and regional species diversity across scales. Recent work has suggested that increased harshness of environmental conditions tends to reduce b-diversity by decreasing ...
Drivers of host plant shifts in the leaf beetle Chrysomela lapponica
... as it infests a number of leaf beetles, including both species that do and do not sequester SGs (Dowden, 1939; Urban, 1997, 2005). Cleonice nitidiuscula was reared from only two SG-using leaf beetle species (Richter & Zvereva, 1996), and therefore, we assumed that it is a specialist parasitoid. Phor ...
... as it infests a number of leaf beetles, including both species that do and do not sequester SGs (Dowden, 1939; Urban, 1997, 2005). Cleonice nitidiuscula was reared from only two SG-using leaf beetle species (Richter & Zvereva, 1996), and therefore, we assumed that it is a specialist parasitoid. Phor ...
Australasian social spiders: what is meant by `social`?
... technology, the possibility of cooperation is predicated upon some form of interattraction, environment-mediated or otherwise: interattraction is possible without,cooperation, but not vice versa. Tolerance, on the other hand, is possible without cooperation, and vice versa: Cyrtophora citricola and ...
... technology, the possibility of cooperation is predicated upon some form of interattraction, environment-mediated or otherwise: interattraction is possible without,cooperation, but not vice versa. Tolerance, on the other hand, is possible without cooperation, and vice versa: Cyrtophora citricola and ...
Coexistence of mixotrophs, autotrophs, and heterotrophs in
... with a tradeoff in affinities for heterotrophic and autotrophic resources. Coexistence of all four nutritional types was not possible, and persistence of mixotrophs was favored by high affinity for the nutrient combined with intermediate affinity for bacterial prey. Kooijman and colleagues have used th ...
... with a tradeoff in affinities for heterotrophic and autotrophic resources. Coexistence of all four nutritional types was not possible, and persistence of mixotrophs was favored by high affinity for the nutrient combined with intermediate affinity for bacterial prey. Kooijman and colleagues have used th ...
Topic:
... Topic: Limiting Factors Essential Question: What do organisms depend on and compete for in an ecosystem? Ecosystem a system involving the interactions between a community of living organisms in a particular area and its nonliving environment ...
... Topic: Limiting Factors Essential Question: What do organisms depend on and compete for in an ecosystem? Ecosystem a system involving the interactions between a community of living organisms in a particular area and its nonliving environment ...
serial depletion of marine invertebrates leads to the decline
... Abstract. We investigated the relative roles of natural factors and shoreline harvest leading to recent declines of the black leather chiton (Katharina tunicata) on the outer Kenai Peninsula, Alaska (USA). This intertidal mollusk is a strongly interacting grazer and a culturally important subsistenc ...
... Abstract. We investigated the relative roles of natural factors and shoreline harvest leading to recent declines of the black leather chiton (Katharina tunicata) on the outer Kenai Peninsula, Alaska (USA). This intertidal mollusk is a strongly interacting grazer and a culturally important subsistenc ...
booklet of abstracts
... marginal contribution of solar radiation and no differences between regions of the French Alps. Our results also suggest that spring phenological phases were delayed at low elevation by a lack of chilling during warm years. With our results, we were able to show that a citizen science program can de ...
... marginal contribution of solar radiation and no differences between regions of the French Alps. Our results also suggest that spring phenological phases were delayed at low elevation by a lack of chilling during warm years. With our results, we were able to show that a citizen science program can de ...
Pdf version - Université de Liège
... by herbivores and make them edible only to some species of fish and urchin. 'However, when the leaves fall off, the toxic compounds are released from the dead cells and dissolve in the water. As a result, they are not present in dead P. oceanica leaves.' While the dead leaves can then be assimilated ...
... by herbivores and make them edible only to some species of fish and urchin. 'However, when the leaves fall off, the toxic compounds are released from the dead cells and dissolve in the water. As a result, they are not present in dead P. oceanica leaves.' While the dead leaves can then be assimilated ...
Selection
... genetics, such as “under what conditions will a gene for recombination be evolutionarily viable?” • Models of social systems: study evolutionary aspects of social systems, such as the evolution of cooperation, the evolution of communication, and trail-following behaviour in ants. ...
... genetics, such as “under what conditions will a gene for recombination be evolutionarily viable?” • Models of social systems: study evolutionary aspects of social systems, such as the evolution of cooperation, the evolution of communication, and trail-following behaviour in ants. ...
Selection - Universitatea Politehnica din Bucuresti
... genetics, such as “under what conditions will a gene for recombination be evolutionarily viable?” • Models of social systems: study evolutionary aspects of social systems, such as the evolution of cooperation, the evolution of communication, and trail-following behaviour in ants. ...
... genetics, such as “under what conditions will a gene for recombination be evolutionarily viable?” • Models of social systems: study evolutionary aspects of social systems, such as the evolution of cooperation, the evolution of communication, and trail-following behaviour in ants. ...
The concept of potential natural vegetation: an epitaph?
... successional stage of vegetation that is identified on the basis of the existing mature stages. Carrión & Fernández (2009) referred to the identification of PNV as an inferential process using the floristic– phytosociological approach. However, this cannot be defined as part of an inferential process ...
... successional stage of vegetation that is identified on the basis of the existing mature stages. Carrión & Fernández (2009) referred to the identification of PNV as an inferential process using the floristic– phytosociological approach. However, this cannot be defined as part of an inferential process ...
temporal and spatial aspects of predator
... ABSTRACT: Ungulates are both major consumers of vegetation and are themselves consumed by carnivores, so food web dynamics, both top-down (predation) and bottom-up (food and weather effects), are prominent in theoretical and applied research involving ungulates. The long generation time of ungulates ...
... ABSTRACT: Ungulates are both major consumers of vegetation and are themselves consumed by carnivores, so food web dynamics, both top-down (predation) and bottom-up (food and weather effects), are prominent in theoretical and applied research involving ungulates. The long generation time of ungulates ...
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.