The University of Chicago
... shift in response to predation risk described above. Consequently, the indirect effects of spiders on plants, mediated by M. femurrubrum grasshoppers, arose largely from trait-mediated effects of spiders on grasshoppers. The previous research explored dynamics in a comparatively simple system, a foo ...
... shift in response to predation risk described above. Consequently, the indirect effects of spiders on plants, mediated by M. femurrubrum grasshoppers, arose largely from trait-mediated effects of spiders on grasshoppers. The previous research explored dynamics in a comparatively simple system, a foo ...
SILICA ACCUMULATION IN GRASSES IN REPONSE TO A LARGE
... Silicon (Si) is the second most abundant element in the earth´s crust and in its form of silica (SiO2) represents an important inorganic constituent in plants (Epstein 1999; Müller 2003). Although all plants contains silicon, the concentration of this element varies greatly among plant species (0,1- ...
... Silicon (Si) is the second most abundant element in the earth´s crust and in its form of silica (SiO2) represents an important inorganic constituent in plants (Epstein 1999; Müller 2003). Although all plants contains silicon, the concentration of this element varies greatly among plant species (0,1- ...
Free sample of
... 13. When populations of two different species interact over long periods of time, changes in the gene pool of one species can lead to changes in the gene pool of the other. This is called a. competition b. coevolution c. coincidence d. commensalism e. predation ANS: B PTS: 1 TOP: 5-1 How Do Species ...
... 13. When populations of two different species interact over long periods of time, changes in the gene pool of one species can lead to changes in the gene pool of the other. This is called a. competition b. coevolution c. coincidence d. commensalism e. predation ANS: B PTS: 1 TOP: 5-1 How Do Species ...
Daphnia hybridization along ecological gradients in pelagic
... among hybridizing species within the complex (Keller et al. 2007). Hybrids are nevertheless fully competitive with parental species when reproducing parthenogenetically, and due to asexual reproduction may at least temporarily avoid hybrid breakdown. Some Daphnia interspecific hybrids may exhibit su ...
... among hybridizing species within the complex (Keller et al. 2007). Hybrids are nevertheless fully competitive with parental species when reproducing parthenogenetically, and due to asexual reproduction may at least temporarily avoid hybrid breakdown. Some Daphnia interspecific hybrids may exhibit su ...
Yellow Starthistle Management with Grazing, Mowing, and
... compared to ungrazed controls. The number of grazings required depends on the amount of late-season rainfall and soil moisture levels. The type of animal appears to be less important than timing; the availability of ruminants, size of infestation, and other site factors will generally determine the ...
... compared to ungrazed controls. The number of grazings required depends on the amount of late-season rainfall and soil moisture levels. The type of animal appears to be less important than timing; the availability of ruminants, size of infestation, and other site factors will generally determine the ...
Competitive abilities of introduced and native grasses
... Differences in competitive ability may explain the maintenance of existing plant populations and the invasion of new areas by plant species. We used field experiments to examine the competitive responses of Agropyron cris tatum (L.) Gaertn., an introduced C 3 grass, and Bouteloua gracilis (HBK.) La ...
... Differences in competitive ability may explain the maintenance of existing plant populations and the invasion of new areas by plant species. We used field experiments to examine the competitive responses of Agropyron cris tatum (L.) Gaertn., an introduced C 3 grass, and Bouteloua gracilis (HBK.) La ...
A synthesis of subdisciplines: predator–prey interactions, and
... The last 15 years has seen parallel surges of interest in two research areas that have rarely intersected: biodiversity and ecosystem functioning (BEF), and multispecies predator– prey interactions (PPI). Research addressing role of biodiversity in ecosystem functioning has focused primarily on sing ...
... The last 15 years has seen parallel surges of interest in two research areas that have rarely intersected: biodiversity and ecosystem functioning (BEF), and multispecies predator– prey interactions (PPI). Research addressing role of biodiversity in ecosystem functioning has focused primarily on sing ...
Volume 22
... Our study provides the first estimate of the number of feral cats on Corvo. We estimated that 123 – 228 cats existed on Corvo during the study period, with a marked difference in density between the lowland and the upland part of the island. The lowland part had a cat density ~20 times higher than t ...
... Our study provides the first estimate of the number of feral cats on Corvo. We estimated that 123 – 228 cats existed on Corvo during the study period, with a marked difference in density between the lowland and the upland part of the island. The lowland part had a cat density ~20 times higher than t ...
Competition between distantly related taxa
... questions I will make clear the assumptions and constraints of this study. I have restricted my analysis to ~ompetition for food resources in terrestrial and freshwater ecosystems in which at least one consumer was a vertebrate. I focused on food competition because there is empirical evidence that ...
... questions I will make clear the assumptions and constraints of this study. I have restricted my analysis to ~ompetition for food resources in terrestrial and freshwater ecosystems in which at least one consumer was a vertebrate. I focused on food competition because there is empirical evidence that ...
Plant growth at elevated CO2
... species also respond to increased CO2 levels (11%). This might be due to increased rates of carbon fixation at elevated CO2 in some C4 species. Another explanation might be that in some experiments plants were thought to grow under optimal conditions, when in fact they were suffering from water stre ...
... species also respond to increased CO2 levels (11%). This might be due to increased rates of carbon fixation at elevated CO2 in some C4 species. Another explanation might be that in some experiments plants were thought to grow under optimal conditions, when in fact they were suffering from water stre ...
Nitrogen Fixer leaf litter loses mass faster than non
... four-month period between the nitrogen-fixer leaf litter, alder and mesquite, and nonnitrogen-fixer leaf litter, Cecropea, Douglas fir and grass presented a possible connection. Alder and Douglas fir are native to the HJ Andrews temperate rainforest, while the other three species are not. The study ...
... four-month period between the nitrogen-fixer leaf litter, alder and mesquite, and nonnitrogen-fixer leaf litter, Cecropea, Douglas fir and grass presented a possible connection. Alder and Douglas fir are native to the HJ Andrews temperate rainforest, while the other three species are not. The study ...
A Stoichiometric Model of Early Plant Primary Succession
... ecosystem nutrient pools, yet the interaction of these processes remains poorly understood. To explore how these mechanisms interact to drive successional dynamics, we devised a stoichiometric ecosystem-level model that considers the role of nitrogen and phosphorus limitation in plant primary succes ...
... ecosystem nutrient pools, yet the interaction of these processes remains poorly understood. To explore how these mechanisms interact to drive successional dynamics, we devised a stoichiometric ecosystem-level model that considers the role of nitrogen and phosphorus limitation in plant primary succes ...
What is an edge species? The implications of sensitivity to habitat
... Intrinsic factors, those directly related to the species’ biology, may cause certain species to be generally insensitive to edges, no matter the extrinsic conditions. Some authors have proposed biological traits that might be associated with edge sensitivity, including negative relationships with ho ...
... Intrinsic factors, those directly related to the species’ biology, may cause certain species to be generally insensitive to edges, no matter the extrinsic conditions. Some authors have proposed biological traits that might be associated with edge sensitivity, including negative relationships with ho ...
THREAT ABATEMENT PLAN
... In accordance with the requirements of the EBPC Act, the original TAP for feral rabbits (EA 1999a) was reviewed in 2004–05 by the Bureau of Rural Sciences (BRS) (Hart 2005) as part of a broader review encompassing the TAPs for foxes (EA 1999b), cats (EA 1999c) and goats (EA 1999d). The BRS review fo ...
... In accordance with the requirements of the EBPC Act, the original TAP for feral rabbits (EA 1999a) was reviewed in 2004–05 by the Bureau of Rural Sciences (BRS) (Hart 2005) as part of a broader review encompassing the TAPs for foxes (EA 1999b), cats (EA 1999c) and goats (EA 1999d). The BRS review fo ...
Sculpin - Department of Fisheries and Aquaculture
... by “jigging” and were considered a nuisance species, often interfering in commercial harvesting for more valuable fish species. Future development of this fishery will require investment and research into harvesting technology and processing techniques. Baited pots could eliminate by-catch issues an ...
... by “jigging” and were considered a nuisance species, often interfering in commercial harvesting for more valuable fish species. Future development of this fishery will require investment and research into harvesting technology and processing techniques. Baited pots could eliminate by-catch issues an ...
Grasshoppers in the Lawn and Garden - KSRE Bookstore
... application can cause frustration. It may appear that the initial treatment did not kill the intruders. In these situations, the grasshoppers were likely killed, but their bodies are overlooked because of the activity of newly arrived grasshoppers. Insecticides currently registered for use against g ...
... application can cause frustration. It may appear that the initial treatment did not kill the intruders. In these situations, the grasshoppers were likely killed, but their bodies are overlooked because of the activity of newly arrived grasshoppers. Insecticides currently registered for use against g ...
Alien Marine Invertebrates of Hawaii
... If possible, photograph and relax specimens before fixing. Put in a jar with enough seawater to allow the specimens or expand fully, then freeze or adds menthol or magnesium chloride. Leave until relaxed, fix in formalin for a maximum of 12 hours; rinse thoroughly in water, store in 70% alcohol. Fla ...
... If possible, photograph and relax specimens before fixing. Put in a jar with enough seawater to allow the specimens or expand fully, then freeze or adds menthol or magnesium chloride. Leave until relaxed, fix in formalin for a maximum of 12 hours; rinse thoroughly in water, store in 70% alcohol. Fla ...
Rockland Hammock Description - Florida Natural Areas Inventory
... Natural Processes: Rockland hammock is a rare community that is susceptible to fire, frost, canopy disruption, and ground water reduction. The dense canopy minimizes temperature fluctuations by reducing soil warming during the day and heat loss at night, which helps prevent frost damage to the inter ...
... Natural Processes: Rockland hammock is a rare community that is susceptible to fire, frost, canopy disruption, and ground water reduction. The dense canopy minimizes temperature fluctuations by reducing soil warming during the day and heat loss at night, which helps prevent frost damage to the inter ...
Ecology and conservation biology of ground beetles - REAL-d
... The third part concerns life history studies. Knowledge of the biology of the study organisms in ecology is essential. Superficial knowledge in this regard can easily derail ecological studies (on such example is discussed in Lövei & Magura 2006), Therefore it is not only natural, but an obligation ...
... The third part concerns life history studies. Knowledge of the biology of the study organisms in ecology is essential. Superficial knowledge in this regard can easily derail ecological studies (on such example is discussed in Lövei & Magura 2006), Therefore it is not only natural, but an obligation ...
Refining mimicry: phenotypic variation tracks the local
... given in supplementary material. Briefly, wing outline was extracted individually from the background. Within this area, the RGB colours are categorized into three colour classes (black, red or yellow). We called ‘yellow’ the bar on all species hindwing so that pattern itself would be comparable, de ...
... given in supplementary material. Briefly, wing outline was extracted individually from the background. Within this area, the RGB colours are categorized into three colour classes (black, red or yellow). We called ‘yellow’ the bar on all species hindwing so that pattern itself would be comparable, de ...
A review of parasites in the Tasmanian devil (Sarcophilus harrisii
... Department of Biological Sciences, Macquarie University, North Ryde, NSW, 2109, Australia Save the Tasmanian Devil Program, The Department of Primary Industries, Parks, Water and Environment, GPO Box ...
... Department of Biological Sciences, Macquarie University, North Ryde, NSW, 2109, Australia Save the Tasmanian Devil Program, The Department of Primary Industries, Parks, Water and Environment, GPO Box ...
A Stoichiometric Model of Early Plant Primary Succession
... ecosystem nutrient pools, yet the interaction of these processes remains poorly understood. To explore how these mechanisms interact to drive successional dynamics, we devised a stoichiometric ecosystem-level model that considers the role of nitrogen and phosphorus limitation in plant primary succes ...
... ecosystem nutrient pools, yet the interaction of these processes remains poorly understood. To explore how these mechanisms interact to drive successional dynamics, we devised a stoichiometric ecosystem-level model that considers the role of nitrogen and phosphorus limitation in plant primary succes ...
Introduced tree species in European forests: opportunities and
... m3, of which 93 % was established by natural regeneration) to the annual timber production. The forest stands dominated by black locust were either artificially established or regenerated naturally between 1920 and 1940. ...
... m3, of which 93 % was established by natural regeneration) to the annual timber production. The forest stands dominated by black locust were either artificially established or regenerated naturally between 1920 and 1940. ...
Bifrenaria
Bifrenaria, abbreviated Bif. in horticultural trade, is a genus of plant in family Orchidaceae. It contains 20 species found in Panama, Trinidad and South America. There are no known uses for them, but their abundant, and at first glance artificial, flowers, make them favorites of orchid growers.The genus can be split in two clearly distinct groups: one of highly robust plants with large flowers, that encompass the first species to be classified under the genus Bifrenaria; other of more delicate plants with smaller flowers occasionally classified as Stenocoryne or Adipe. There are two additional species that are normally classified as Bifrenaria, but which molecular analysis indicate to belong to different orchid groups entirely. One is Bifrenaria grandis which is endemic to Bolívia and which is now placed in Lacaena, and Bifrenaria steyermarkii, an inhabitant of the northern Amazon Forest, which does not have an alternative classification.