![the ecology and microbiology of Vibrio cholerae](http://s1.studyres.com/store/data/016047655_1-5d295290d30fda5da832eb6cdfdc4783-300x300.png)
the ecology and microbiology of Vibrio cholerae
... indiscriminately on both active and inactive (VBNC) In areas where cholera is endemic, disease outbreaks cells (Cole 1999; Langenheder and Jürgens 2001). begin when humans are infected with V. cholerae from the However, protists can be limited by bacterial size, so that environment, and may then be ...
... indiscriminately on both active and inactive (VBNC) In areas where cholera is endemic, disease outbreaks cells (Cole 1999; Langenheder and Jürgens 2001). begin when humans are infected with V. cholerae from the However, protists can be limited by bacterial size, so that environment, and may then be ...
1 – Introduction
... are increased by the application of ammonium-based fertilizers; these emissions contribute greatly to global climate change as methane is a potent greenhouse gas . Through the increasing use of nitrogen fertilizer, which is added at a rate of 1 billion tons per year presently[64] to the already exis ...
... are increased by the application of ammonium-based fertilizers; these emissions contribute greatly to global climate change as methane is a potent greenhouse gas . Through the increasing use of nitrogen fertilizer, which is added at a rate of 1 billion tons per year presently[64] to the already exis ...
ECOLOGICAL MODELING OF AMERICAN LOBSTER (Homarus
... key ecosystem parameters suggest that the mid- 1990s ecosystem tends to be more mature than the mid-1 980s ecosystem. The results also suggest that there is a negative relationship between cod biomass and lobster biomass. A substantial increase in fishing mortality in the cod fishery is likely to le ...
... key ecosystem parameters suggest that the mid- 1990s ecosystem tends to be more mature than the mid-1 980s ecosystem. The results also suggest that there is a negative relationship between cod biomass and lobster biomass. A substantial increase in fishing mortality in the cod fishery is likely to le ...
(Diptera: Culicidae) Within the United States?
... used. The rationale for using many of these detritus types was based on either known detrital patterns in the field (Kesavaraju et al. 2014) or were used to isolate other factors of interest (e.g., interspecific density; Juliano 1998). As mentioned, there have been broader examinations of the effect ...
... used. The rationale for using many of these detritus types was based on either known detrital patterns in the field (Kesavaraju et al. 2014) or were used to isolate other factors of interest (e.g., interspecific density; Juliano 1998). As mentioned, there have been broader examinations of the effect ...
Intermittent Stream Ecology
... Reduction of the rates of water extractions from these critical waterways appears to be one management step that can yield meaningful improvement in intermittent stream health. Unfortunately, current research does not inform us as to how much water can be extracted without significantly degradi ...
... Reduction of the rates of water extractions from these critical waterways appears to be one management step that can yield meaningful improvement in intermittent stream health. Unfortunately, current research does not inform us as to how much water can be extracted without significantly degradi ...
Using leaf chemistry to better understand the
... seagrass species from overseas. Foliar concentrations of phosphorous were at the higher end of ranges reported elsewhere and as such N:P ratios were low. C:P and C:N ratios were also low suggesting the supply of nutrients exceeded carbon acquisition indicating plants were not nutrient limited. There ...
... seagrass species from overseas. Foliar concentrations of phosphorous were at the higher end of ranges reported elsewhere and as such N:P ratios were low. C:P and C:N ratios were also low suggesting the supply of nutrients exceeded carbon acquisition indicating plants were not nutrient limited. There ...
Review article Annual intercrops: an alternative pathway for
... used cropping practice which aims to match efficiently crop demands to the available growth resources and labor. The most common advantage of intercropping is the production of greater yield on a given piece of land by making more efficient use of the available growth resources using a mixture of cr ...
... used cropping practice which aims to match efficiently crop demands to the available growth resources and labor. The most common advantage of intercropping is the production of greater yield on a given piece of land by making more efficient use of the available growth resources using a mixture of cr ...
United States Department of the Interior
... Longfin smelt are dispersed broadly in the Bay-Delta by high flows and currents, which facilitate transport of larvae and juveniles long distances. Longfin smelt larvae are dispersed farther downstream during high freshwater flows (Dege and Brown 2004, p. 59). They spend approximately 21 months of t ...
... Longfin smelt are dispersed broadly in the Bay-Delta by high flows and currents, which facilitate transport of larvae and juveniles long distances. Longfin smelt larvae are dispersed farther downstream during high freshwater flows (Dege and Brown 2004, p. 59). They spend approximately 21 months of t ...
environmental filtering of enzymatic activities
... 2008). Then, we addressed whether changing availability of alternative sources of C-, N- and P-containing compounds in surrounding soil organic matter influenced ECM enzymatic activities in communities, using a multitable ordination method (i.e. RLQ analysis; Doledec et al. 1996;). Our basic hypothes ...
... 2008). Then, we addressed whether changing availability of alternative sources of C-, N- and P-containing compounds in surrounding soil organic matter influenced ECM enzymatic activities in communities, using a multitable ordination method (i.e. RLQ analysis; Doledec et al. 1996;). Our basic hypothes ...
Mesotrophic Lochs WW1 - Tayside Biodiversity
... may be due to direct nutrient inputs from sewage or because of increased nutrient run-off from land due to agriculture, forestry and amenity use. Catchment land use may be a significant influence in mesotrophic lochs with ploughing up of grassland and underdrainage potentially increasing the possibi ...
... may be due to direct nutrient inputs from sewage or because of increased nutrient run-off from land due to agriculture, forestry and amenity use. Catchment land use may be a significant influence in mesotrophic lochs with ploughing up of grassland and underdrainage potentially increasing the possibi ...
fisken og
... change. Four different habitat types are included in the assessment. The habitat types represent important habitats for C. gigas in Scandinavia. The risk assessment is based on an analysis of the present scientific knowledge of the distribution patterns of C. gigas in Scandinavia, including the chan ...
... change. Four different habitat types are included in the assessment. The habitat types represent important habitats for C. gigas in Scandinavia. The risk assessment is based on an analysis of the present scientific knowledge of the distribution patterns of C. gigas in Scandinavia, including the chan ...
Estuary Chpt. 1 - Overview of the Kennebec Estuary
... repository for the combined noxious effluent of the watershed, rather than as a healthy, biologically diverse interface between riverine and nearshore ecosystems. In some cases, ecological improvements since the nadir of the estuary’s health were dramatic and rapid once corrective measures were impl ...
... repository for the combined noxious effluent of the watershed, rather than as a healthy, biologically diverse interface between riverine and nearshore ecosystems. In some cases, ecological improvements since the nadir of the estuary’s health were dramatic and rapid once corrective measures were impl ...
Pathways for Nitrogen Cycling in Earth`s Crust and Upper Mantle: A
... This is a preprint, the final version is subject to change, of the American Mineralogist (MSA) Cite as Authors (Year) Title. American Mineralogist, in press. (DOI will not work until issue is live.) DOI: http://dx.doi.org/10.2138/am-2015-5363 ...
... This is a preprint, the final version is subject to change, of the American Mineralogist (MSA) Cite as Authors (Year) Title. American Mineralogist, in press. (DOI will not work until issue is live.) DOI: http://dx.doi.org/10.2138/am-2015-5363 ...
Identifying potential environmental impacts of large - TSEC
... between compartments within a ecosystem. Understand the rates of these processes is first step in managing ecosystems for maximum benefit for both biodiversity and yield. ...
... between compartments within a ecosystem. Understand the rates of these processes is first step in managing ecosystems for maximum benefit for both biodiversity and yield. ...
The role of diversity in savannas: modelling plant functional diversity
... grass-dominated state of the ecosystem to a state which is mainly dominated by woody plants. Degradation in general can be defined as changes in ecosystem functioning (Eldridge et al., 2011), ultimately leading to a loss of ecosystem services (Chapin et al., 2002). In savanna ecosystems, this typica ...
... grass-dominated state of the ecosystem to a state which is mainly dominated by woody plants. Degradation in general can be defined as changes in ecosystem functioning (Eldridge et al., 2011), ultimately leading to a loss of ecosystem services (Chapin et al., 2002). In savanna ecosystems, this typica ...
Habitat complexity: approaches and future directions
... studied. For example, even though effects of habitat complexity on predator–prey interactions attract almost as much attention as its effects on richness (e.g., Crowder & Cooper, 1982; Finke & Denno, 2002; Warfe & Barmuta, 2004; Grabowski et al., 2008), their implications for the general food web th ...
... studied. For example, even though effects of habitat complexity on predator–prey interactions attract almost as much attention as its effects on richness (e.g., Crowder & Cooper, 1982; Finke & Denno, 2002; Warfe & Barmuta, 2004; Grabowski et al., 2008), their implications for the general food web th ...
Phosphorus retention in forest soils and the functioning of
... 4.2. Relation between soil P retention properties and the risk of P leaching .......... 32 4.3. Possibilities to remove soluble P from water flow by peatland buffer zone areas ............................................................................................................. 34 ...
... 4.2. Relation between soil P retention properties and the risk of P leaching .......... 32 4.3. Possibilities to remove soluble P from water flow by peatland buffer zone areas ............................................................................................................. 34 ...
Linking Landscapes and Food Webs: Effects of Omnivorous Fish
... detritus. This species can strongly affect many components 25 to 30 mm in length) develop morphological features, inof aquatic ecosystems, including other fish species, zoocluding a subterminal mouth, muscular gizzard, and elongated plankton, phytoplankton, and nutrients (Drenner et al. 1986, intest ...
... detritus. This species can strongly affect many components 25 to 30 mm in length) develop morphological features, inof aquatic ecosystems, including other fish species, zoocluding a subterminal mouth, muscular gizzard, and elongated plankton, phytoplankton, and nutrients (Drenner et al. 1986, intest ...
Effects of physical disturbance and habitat
... The studies for this thesis were conducted in the northern Gulf of Riga (I, III, IV) and southwestern Gulf of Finland (II, V), Baltic Sea (Fig. 1). The Gulf of Riga is situated in the northern Baltic Sea and is a relatively shallow water body. The gulf is connected to the Baltic Proper via narrow st ...
... The studies for this thesis were conducted in the northern Gulf of Riga (I, III, IV) and southwestern Gulf of Finland (II, V), Baltic Sea (Fig. 1). The Gulf of Riga is situated in the northern Baltic Sea and is a relatively shallow water body. The gulf is connected to the Baltic Proper via narrow st ...
The Physical Environment of Rupestrian Grasslands (Campos
... The rupestrian grassland constitute a singular kingdom of plants that form an ancient vegetation complex (rupestrian grassland complex—RGC). In Brazil, rupestrian grassland refers to rupicolous or rupestrian (rocky habitat) vegetation that grows on a range of geologies, including quartzite–sandstone ...
... The rupestrian grassland constitute a singular kingdom of plants that form an ancient vegetation complex (rupestrian grassland complex—RGC). In Brazil, rupestrian grassland refers to rupicolous or rupestrian (rocky habitat) vegetation that grows on a range of geologies, including quartzite–sandstone ...
Organic Production Systems Guidelines
... North America, is increasing for food and agricultural products that are perceived to be healthy and have low impact on the environment. A willingness to pay a premium for such products is apparent where products carry a verifiable assurance they are safe, nutritious and produced using systems with ...
... North America, is increasing for food and agricultural products that are perceived to be healthy and have low impact on the environment. A willingness to pay a premium for such products is apparent where products carry a verifiable assurance they are safe, nutritious and produced using systems with ...
The invasive Pacific oyster, Crassostrea gigas, in
... areas there is a limited to moderate risk that a bio-invasion of C. gigas will develop. For Biogenic reefs and Sub-littoral sediment in high energy areas there is a moderate to high risk for a bio-invasion. A risk assessment was performed for each of the four habitat types: It is concluded that for ...
... areas there is a limited to moderate risk that a bio-invasion of C. gigas will develop. For Biogenic reefs and Sub-littoral sediment in high energy areas there is a moderate to high risk for a bio-invasion. A risk assessment was performed for each of the four habitat types: It is concluded that for ...
The Invasion of the Zebra Mussel - Effects on Phytoplankton
... effects of the invasion have been stronger in North America than in Europe but there are some reports of the Dreissena causing economic problems in Europe in the past (e.g., Clarke 1952) although they are not in the same magnitude as observed in the United States and Canada (Ram & McMahon 1996). Fo ...
... effects of the invasion have been stronger in North America than in Europe but there are some reports of the Dreissena causing economic problems in Europe in the past (e.g., Clarke 1952) although they are not in the same magnitude as observed in the United States and Canada (Ram & McMahon 1996). Fo ...
Abstract Nutrient enrichment and climate warming effects on plant
... P. maculata survival and Eichhornia crassipes (water hyacinth) and A. philoxeroides are not ideal food sources for P. maculata. However, P. maculata growth increased with elevated nutrients via changes in plants but was independent of plant identity. In field mesocosm experiments, elevated nutrient ...
... P. maculata survival and Eichhornia crassipes (water hyacinth) and A. philoxeroides are not ideal food sources for P. maculata. However, P. maculata growth increased with elevated nutrients via changes in plants but was independent of plant identity. In field mesocosm experiments, elevated nutrient ...
restoration of tall fescue pastures to native warm season grasslands
... people, without whom it would not have been possible. First and foremost I‟d like to acknowledge my advisor, Dr. Rebecca McCulley, who provided guidance and mentorship throughout the project. During the first two and a half years of my project I was employed full-time at Kentucky State University. W ...
... people, without whom it would not have been possible. First and foremost I‟d like to acknowledge my advisor, Dr. Rebecca McCulley, who provided guidance and mentorship throughout the project. During the first two and a half years of my project I was employed full-time at Kentucky State University. W ...
Human impact on the nitrogen cycle
Human impact on the nitrogen cycle is diverse. Agricultural and industrial nitrogen (N) inputs to the environment currently exceed inputs from natural N fixation. As a consequence of anthropogenic inputs, the global nitrogen cycle (Fig. 1) has been significantly altered over the past century. Global atmospheric nitrous oxide (N2O) mole fractions have increased from a pre-industrial value of ~270 nmol/mol to ~319 nmol/mol in 2005. Human activities account for over one-third of N2O emissions, most of which are due to the agricultural sector. This article is intended to give a brief review of the history of anthropogenic N inputs, and reported impacts of nitrogen inputs on selected terrestrial and aquatic ecosystems.