Does eutrophication-driven evolution change aquatic ecosystems?
... The altered physical environment associated with eutrophication can affect visual signalling between mates and between competitors. When sexual selection is mediated by visionbased mate choice, as in many fish, eutrophication-induced loss of water clarity is predicted to weaken sexual selection. Ma ...
... The altered physical environment associated with eutrophication can affect visual signalling between mates and between competitors. When sexual selection is mediated by visionbased mate choice, as in many fish, eutrophication-induced loss of water clarity is predicted to weaken sexual selection. Ma ...
Biological Resources
... anadromous fisheries. Urban and suburban development, freeway and highway widening projects, vineyard expansion, and use of exclusionary fencing to protect crops have all contributed to considerable fragmentation of the remaining natural areas in the county. Although past influences have greatly alt ...
... anadromous fisheries. Urban and suburban development, freeway and highway widening projects, vineyard expansion, and use of exclusionary fencing to protect crops have all contributed to considerable fragmentation of the remaining natural areas in the county. Although past influences have greatly alt ...
Primary consumers
... • The growth of algae and cyanobacteria in aquatic ecosystems is limited by low nutrient levels, especially of phosphorus and nitrogen. • Nutrient pollution occurs when human activities add excess amounts of these chemicals to aquatic ecosystems. ...
... • The growth of algae and cyanobacteria in aquatic ecosystems is limited by low nutrient levels, especially of phosphorus and nitrogen. • Nutrient pollution occurs when human activities add excess amounts of these chemicals to aquatic ecosystems. ...
Plant coexistence and the niche
... able to maintain a long-term average net reproductive rate that is R1. Niche axis: a dimension in n-dimensional niche space along which species can ...
... able to maintain a long-term average net reproductive rate that is R1. Niche axis: a dimension in n-dimensional niche space along which species can ...
New Mexico Wildlife Action Plan
... be of greatest conservation need; species that are indicative of the diversity and overall health of the state’s wildlife resources. They include: declining, endemic and vulnerable species (which may, or may not, be federal, state or Tribal protected species); keystone species that contribute to eco ...
... be of greatest conservation need; species that are indicative of the diversity and overall health of the state’s wildlife resources. They include: declining, endemic and vulnerable species (which may, or may not, be federal, state or Tribal protected species); keystone species that contribute to eco ...
amphibian and reptile survey report and management plan for
... that flows north from Williams Lake, exiting the Base at East 6th Avenue. This drainage was dry during the entire 2010 survey period and appears to receive very sporadic overflow from the outflow channel of Williams Lake and seepage from behind the dam at Williams Lake. These flows appear much less ...
... that flows north from Williams Lake, exiting the Base at East 6th Avenue. This drainage was dry during the entire 2010 survey period and appears to receive very sporadic overflow from the outflow channel of Williams Lake and seepage from behind the dam at Williams Lake. These flows appear much less ...
Progress in Physical Geography
... rates of angiosperm diversification in the tropics. Diversification is not only present at the species level but also at higher taxonomic levels such as the family and genus (Chown and Gaston, 2000). This lends credence to a long time-frame of evolutionary change. Primitive tree species that are com ...
... rates of angiosperm diversification in the tropics. Diversification is not only present at the species level but also at higher taxonomic levels such as the family and genus (Chown and Gaston, 2000). This lends credence to a long time-frame of evolutionary change. Primitive tree species that are com ...
Large Species Shifts Triggered by Small Forces
... In order to induce a switch back to the upper branch, it is not sufficient to restore the environmental conditions before the collapse (F2). Instead, one needs to go back beyond the other bifurcation point (F1), where the system recovers by shifting back to the upper branch. The difference between f ...
... In order to induce a switch back to the upper branch, it is not sufficient to restore the environmental conditions before the collapse (F2). Instead, one needs to go back beyond the other bifurcation point (F1), where the system recovers by shifting back to the upper branch. The difference between f ...
Action Plan No.7 - Environment, Planning and Sustainable
... settlement. In the ACT, these grasslands are not found at an altitude above 630 m. Areas dominated by D. carphoides occur in grasslands containing Danthonia or Stipa associations, and may occur in patches in Dry Themeda grasslands (see the Action Plan for Natural Temperate Grassland for a more detai ...
... settlement. In the ACT, these grasslands are not found at an altitude above 630 m. Areas dominated by D. carphoides occur in grasslands containing Danthonia or Stipa associations, and may occur in patches in Dry Themeda grasslands (see the Action Plan for Natural Temperate Grassland for a more detai ...
Fauna Conservation Enclosure report
... Brush Tailed Phascogale, Western Ring tailed Possum and Brush tailed Possum (with Woylie, Black Gloved Wallaby and other fauna species also assessed but of much less likely suitability for the BFCE). The current project proposal is based on the technical advisory committee‟s advice that it would be ...
... Brush Tailed Phascogale, Western Ring tailed Possum and Brush tailed Possum (with Woylie, Black Gloved Wallaby and other fauna species also assessed but of much less likely suitability for the BFCE). The current project proposal is based on the technical advisory committee‟s advice that it would be ...
Apparent predation risk: tests of habitat selection theory reveal
... systems (Lima 1998). Such experiments are sorely needed because: (1) trait-mediated interactions may often depend on the density of other prey (Peacor, 2003); (2) trait-mediated effects, such as reduced prey activity in the presence of predators (Peacor and Werner, 1997), may themselves ‘cascade’ ac ...
... systems (Lima 1998). Such experiments are sorely needed because: (1) trait-mediated interactions may often depend on the density of other prey (Peacor, 2003); (2) trait-mediated effects, such as reduced prey activity in the presence of predators (Peacor and Werner, 1997), may themselves ‘cascade’ ac ...
Schiel—Algal interactions on subtidal reefs
... the competitive effects of adult canopies on recruitment to the substratum below; second, the seasonality of spore release and availability of free space; and third, the demographic characteristics of species and their influence on recruitment. Adult canopies suppress recruitment of all species. Bot ...
... the competitive effects of adult canopies on recruitment to the substratum below; second, the seasonality of spore release and availability of free space; and third, the demographic characteristics of species and their influence on recruitment. Adult canopies suppress recruitment of all species. Bot ...
Native Habitats for Monarch Butterflies in South Florida
... Butterflies depend on particular microhabitats—small areas within an ecosystem that have specific conditions and resources, such as vegetational structure, microclimate, moisture, and presence/absence of other animals (predators or competitors). Such close attention to particulars is especially impo ...
... Butterflies depend on particular microhabitats—small areas within an ecosystem that have specific conditions and resources, such as vegetational structure, microclimate, moisture, and presence/absence of other animals (predators or competitors). Such close attention to particulars is especially impo ...
Biological Diversity
... environment seemed too amazing to have come about by chance. The only possible explanation seemed to be that this diversity was created by God (or gods). People were fascinated by this diversity, and were familiar with it, as illustrated by the famous medieval tapestry, The Hunting of the Unicorn. I ...
... environment seemed too amazing to have come about by chance. The only possible explanation seemed to be that this diversity was created by God (or gods). People were fascinated by this diversity, and were familiar with it, as illustrated by the famous medieval tapestry, The Hunting of the Unicorn. I ...
6 Succession and Change in Ecosystems
... Another way to control insect pests is to use their natural enemies. This method, called biological control, can be very effective and limits or eliminates the need for pesticides. For example, leafy spurge is a weed that was accidentally introduced into Canada in the late 1800s (see Figure 1.52). L ...
... Another way to control insect pests is to use their natural enemies. This method, called biological control, can be very effective and limits or eliminates the need for pesticides. For example, leafy spurge is a weed that was accidentally introduced into Canada in the late 1800s (see Figure 1.52). L ...
A declining species has to be added to the official list of endangered
... Critical habitat was required to be designated concurrently with the listing of a species, when prudent, and economic and other impacts of designation were required to be considered in deciding on boundaries [section 4]; The Secretaries of Interior and Agriculture (for the Forest Service) were direc ...
... Critical habitat was required to be designated concurrently with the listing of a species, when prudent, and economic and other impacts of designation were required to be considered in deciding on boundaries [section 4]; The Secretaries of Interior and Agriculture (for the Forest Service) were direc ...
Ecological Integrity and Canada`s National Parks
... Ecological integrity means, with respect to a park, a condition that is determined to be characteristic of its natural region and likely to persist, including abiotic components and the composition and abundance of native species and biological communities, rates of change and ...
... Ecological integrity means, with respect to a park, a condition that is determined to be characteristic of its natural region and likely to persist, including abiotic components and the composition and abundance of native species and biological communities, rates of change and ...
tusked frog - Queensland Government
... Tadpoles may be found in ponds and unconnected stream-side pools. The most effective way to capture tadpoles is with a small hand-held dip net. For identification purposes, tadpoles can be held in a sealable plastic bag, ideally filled with stream/pond water from the point of capture (Meyer et al. 2 ...
... Tadpoles may be found in ponds and unconnected stream-side pools. The most effective way to capture tadpoles is with a small hand-held dip net. For identification purposes, tadpoles can be held in a sealable plastic bag, ideally filled with stream/pond water from the point of capture (Meyer et al. 2 ...
ch11_Lecture_3e - Lakeland Central School District
... • During this Quaternary period, we may lose more than half of all species - Hundreds of human-induced species extinctions, and multitudes of others, teeter on the brink of extinction • The current global extinction rate is 100 to 1,000 times greater than the background rate - This rate will increas ...
... • During this Quaternary period, we may lose more than half of all species - Hundreds of human-induced species extinctions, and multitudes of others, teeter on the brink of extinction • The current global extinction rate is 100 to 1,000 times greater than the background rate - This rate will increas ...
estimating species richness three different ways
... Abstract. Species richness is an important characteristic of ecological communities, but it is difficult to quantify. We report here a thorough inventory of a tropical rain forest ant fauna and use it to evaluate species richness estimators. The study was carried out in ;1500 ha of lowland rain fore ...
... Abstract. Species richness is an important characteristic of ecological communities, but it is difficult to quantify. We report here a thorough inventory of a tropical rain forest ant fauna and use it to evaluate species richness estimators. The study was carried out in ;1500 ha of lowland rain fore ...
Reconciliation ecology
Reconciliation ecology is the branch of ecology which studies ways to encourage biodiversity in human-dominated ecosystems. Michael Rosenzweig first articulated the concept in his book Win-Win Ecology, based on the theory that there is not enough area for all of earth’s biodiversity to be saved within designated nature preserves. Therefore, humans should increase biodiversity in human-dominated landscapes. By managing for biodiversity in ways that do not decrease human utility of the system, it is a ""win-win"" situation for both human use and native biodiversity. The science is based in the ecological foundation of human land-use trends and species-area relationships. It has many benefits beyond protection of biodiversity, and there are numerous examples of it around the globe. Aspects of reconciliation ecology can already be found in management legislation, but there are challenges in both public acceptance and ecological success of reconciliation attempts.