Conserving biodiversity and combating desertification: Achieving
... the determinants of the two problems better suited to the present situation and knowledge status? `Are there shared determinants of biodiversity decline and desertification in the Northern Mediterranean? ...
... the determinants of the two problems better suited to the present situation and knowledge status? `Are there shared determinants of biodiversity decline and desertification in the Northern Mediterranean? ...
The diversity–stability debate
... the whole ecosystem? Ambitious experimental set ups such as that currently underway in the Ecotron (Fig. 1) are attempting to bridge the gap between the complexity of real field communities and the simplicity of laboratory or greenhouse experiments. The evidence that has emerged from microcosm exper ...
... the whole ecosystem? Ambitious experimental set ups such as that currently underway in the Ecotron (Fig. 1) are attempting to bridge the gap between the complexity of real field communities and the simplicity of laboratory or greenhouse experiments. The evidence that has emerged from microcosm exper ...
Estuarine Nutrient Cycling - The Influence of
... Copenhagen, Denmark. Many of our colleagues contributed with very interesting presentations, but it became obvious that most of us tend to study the effect of one specific plant type on one aspect of nutrient cycling (e.g. the effects of seagrasses on benthic nitrification-denitrification). A more h ...
... Copenhagen, Denmark. Many of our colleagues contributed with very interesting presentations, but it became obvious that most of us tend to study the effect of one specific plant type on one aspect of nutrient cycling (e.g. the effects of seagrasses on benthic nitrification-denitrification). A more h ...
Restoration of Ecosystems
... • Young discipline is maturing (into what?) • Context of rapidly changing environment • Jargon/terminology of ‘restoration’ – (reclamation, rehabilitation, revegetation) creates unrealistic expectations ...
... • Young discipline is maturing (into what?) • Context of rapidly changing environment • Jargon/terminology of ‘restoration’ – (reclamation, rehabilitation, revegetation) creates unrealistic expectations ...
Cascading top-down effects of changing oceanic predator
... studies (as well as studies solely of planktonic organisms not included herein). The number of top-down studies increased sevenfold in this period, almost three times as fast as studies focused on bottom-up control in the ocean. ...
... studies (as well as studies solely of planktonic organisms not included herein). The number of top-down studies increased sevenfold in this period, almost three times as fast as studies focused on bottom-up control in the ocean. ...
- Wiley Online Library
... studies (as well as studies solely of planktonic organisms not included herein). The number of top-down studies increased sevenfold in this period, almost three times as fast as studies focused on bottom-up control in the ocean. ...
... studies (as well as studies solely of planktonic organisms not included herein). The number of top-down studies increased sevenfold in this period, almost three times as fast as studies focused on bottom-up control in the ocean. ...
Process analysis of regional ozone formation over the Yangtze River
... characterized by high boundaries EIA Global Emissions Inventory Activity (http://geiacenter.org). To help explain the of the layers. population density and well-developed industry, is one of the Previous studies (e.g., Jiménez et al., 2007) have shown results, Figure 2 gives the distribution of NOx ...
... characterized by high boundaries EIA Global Emissions Inventory Activity (http://geiacenter.org). To help explain the of the layers. population density and well-developed industry, is one of the Previous studies (e.g., Jiménez et al., 2007) have shown results, Figure 2 gives the distribution of NOx ...
Effects of Enrichment on Simple Aquatic Food Webs.
... A fundamental prediction from Lotka-Volterra-type predator-prey models (i.e., with prey-dependent functional response), termed the “paradox of enrichment,” states that increasing the carrying capacity of the prey will force the equilibrium density of the prey and the predator to move from a stable f ...
... A fundamental prediction from Lotka-Volterra-type predator-prey models (i.e., with prey-dependent functional response), termed the “paradox of enrichment,” states that increasing the carrying capacity of the prey will force the equilibrium density of the prey and the predator to move from a stable f ...
Progress in Oceanography
... off West Greenland and Norway, although no data from north of the Arctic Circle were analyzed (see also Beverton and Lee, 1965). A significant but lower sea surface temperature increase was observed off southwest Iceland (Fig. 4; Thomsen, 1937). The increase at the Faroes was of the order 0.5 C and oc ...
... off West Greenland and Norway, although no data from north of the Arctic Circle were analyzed (see also Beverton and Lee, 1965). A significant but lower sea surface temperature increase was observed off southwest Iceland (Fig. 4; Thomsen, 1937). The increase at the Faroes was of the order 0.5 C and oc ...
"Organic," as a label on produce and other groceries, finally has real
... The organic method treats the soil, plants and animals as a living system. From the environmental and human perspective, this is a better way to grow food, albeit less efficient than conventional farming in terms of yield per acre. However, "efficiency" must also be measured in terms of the long-ter ...
... The organic method treats the soil, plants and animals as a living system. From the environmental and human perspective, this is a better way to grow food, albeit less efficient than conventional farming in terms of yield per acre. However, "efficiency" must also be measured in terms of the long-ter ...
The dependence of root system properties on root system biomass... North American grassland species
... significantly with increasing total belowground biomass for A. gerardii, L. capitata and P. villosum, and the other 7 species had non-significant trends for increasing tissue density with increasing belowground biomass (average rate of increase = 0.00010 g root biomass cm−3 g−1 root biomass m−2 ). T ...
... significantly with increasing total belowground biomass for A. gerardii, L. capitata and P. villosum, and the other 7 species had non-significant trends for increasing tissue density with increasing belowground biomass (average rate of increase = 0.00010 g root biomass cm−3 g−1 root biomass m−2 ). T ...
Logan et al Oecologia Revised Manuscript Final Format
... 1985). If nitrogen isotope turnover and protein turnover are related, observed variation in turnover rates between mummichog tissues would match variation observed in other fish species. Protein turnover in rainbow trout, Oncorhynchus mykiss, (Fauconneau and Arnal 1985) and mummichogs (Jackim and La ...
... 1985). If nitrogen isotope turnover and protein turnover are related, observed variation in turnover rates between mummichog tissues would match variation observed in other fish species. Protein turnover in rainbow trout, Oncorhynchus mykiss, (Fauconneau and Arnal 1985) and mummichogs (Jackim and La ...
Sociobiology - Universidade Estadual de Feira de Santana
... Abstract Natural earth mounds in many ecosystems harbor higher biodiversity than surroundings because they provide greater habitat heterogeneity. However, in the semi-arid Caatinga ecosystem of NE Brazil, natural mounds have much less vegetation and leaf litter with lower biodiversity as compared to ...
... Abstract Natural earth mounds in many ecosystems harbor higher biodiversity than surroundings because they provide greater habitat heterogeneity. However, in the semi-arid Caatinga ecosystem of NE Brazil, natural mounds have much less vegetation and leaf litter with lower biodiversity as compared to ...
Journal of Animal Ecology 82(6) - Seagrass Ecosystems Research
... Shark Bay is characterized by a series of shallow (<45 m) banks, mostly covered by seagrass, separated by deeper channels (6–11 m) that are approximately 06–21 km wide and mostly unvegetated. Shallow habitats can be further subdivided into two microhabitats – interior portions of banks and bank e ...
... Shark Bay is characterized by a series of shallow (<45 m) banks, mostly covered by seagrass, separated by deeper channels (6–11 m) that are approximately 06–21 km wide and mostly unvegetated. Shallow habitats can be further subdivided into two microhabitats – interior portions of banks and bank e ...
Decomposer animals and bioremediation of soils
... have been developed to determine bio-availability and biological eects of harmful chemicals and contaminated soils. Together with chemical analyses, soil animal studies will help in ®nding out the linkage between actual contamination levels and adverse eects on biota. Being important and large soi ...
... have been developed to determine bio-availability and biological eects of harmful chemicals and contaminated soils. Together with chemical analyses, soil animal studies will help in ®nding out the linkage between actual contamination levels and adverse eects on biota. Being important and large soi ...
Evaluating the functional importance of secretive species: A case
... prey annually, translating into >150 000 kJ ha1 of energy flow from secondary to tertiary consumers within the wetland food web. Further, because many amphibians are primarily terrestrial as adults and are consumed by aquatic snakes only when they return to wetlands to breed, snakes can be responsib ...
... prey annually, translating into >150 000 kJ ha1 of energy flow from secondary to tertiary consumers within the wetland food web. Further, because many amphibians are primarily terrestrial as adults and are consumed by aquatic snakes only when they return to wetlands to breed, snakes can be responsib ...
Two-year temporal response of benthic macrofauna and sediments
... Rev. Biol. Trop. (Int. J. Trop. Biol. ISSN-0034-7744) Vol. 64 (1): 177-188, March 2016 ...
... Rev. Biol. Trop. (Int. J. Trop. Biol. ISSN-0034-7744) Vol. 64 (1): 177-188, March 2016 ...
Subaqueous Soil Survey
... boundaries and distribution of different soil types (series) with water depths Subaqueous soil field descriptions, field notes and investigations, vibra-cores, and laboratory data are used to identify and delineate subaqueous soil mapping ...
... boundaries and distribution of different soil types (series) with water depths Subaqueous soil field descriptions, field notes and investigations, vibra-cores, and laboratory data are used to identify and delineate subaqueous soil mapping ...
N utritional Disorders
... for nitrates, 200 ppm for soluble organic nitrogen and 800 ppm for total soluble nitrogen. Nitrogen deficiency may be controlled by applying a nitrogen fertilizer or by the incorporation of animal manure (59) and green manure (2, 48, 50, 52). N o significant differences ha ve been noted between nitr ...
... for nitrates, 200 ppm for soluble organic nitrogen and 800 ppm for total soluble nitrogen. Nitrogen deficiency may be controlled by applying a nitrogen fertilizer or by the incorporation of animal manure (59) and green manure (2, 48, 50, 52). N o significant differences ha ve been noted between nitr ...
Herbivore-induced resource sequestration in plants: why bother?
... Abstract Herbivores can cause numerous changes in primary plant metabolism. Recent studies using radioisotopes, for example, have found that insect herbivores and related cues can induce faster export from leaves and roots and greater partitioning into tissues inaccessible to foraging herbivores. Th ...
... Abstract Herbivores can cause numerous changes in primary plant metabolism. Recent studies using radioisotopes, for example, have found that insect herbivores and related cues can induce faster export from leaves and roots and greater partitioning into tissues inaccessible to foraging herbivores. Th ...
The role of earthworms for assessment of sustainability and as
... landscape structures and transformations. Species number, abundance and biomass can give easily measurable elements. Ecological guilds can help in comparing different environments. Taxonomy is relatively well known, at least in temperate areas, where species identification is in general easily solve ...
... landscape structures and transformations. Species number, abundance and biomass can give easily measurable elements. Ecological guilds can help in comparing different environments. Taxonomy is relatively well known, at least in temperate areas, where species identification is in general easily solve ...
Will the increasing atmospheric CO2 concentration affect the
... of plant species that are likely to benefit from the [CO2] increase in community settings. Within these categories, it is still difficult to predict which species will benefit the most. However, knowledge about ecosystem-level responses can lead to the identification of plant traits that will confer ...
... of plant species that are likely to benefit from the [CO2] increase in community settings. Within these categories, it is still difficult to predict which species will benefit the most. However, knowledge about ecosystem-level responses can lead to the identification of plant traits that will confer ...
The Disturbing History of Intermediate Disturbance David M
... disturbance. Connell (1978) presents such a graph (his Fig. 1) as does Horn (1975: 209). In his legend for this figure Horn wrote 'Note that intermediate disturbances produce higher diversity than either very high or very low levels' (Horn 1975: 209). A very clear statement of the intermediate distu ...
... disturbance. Connell (1978) presents such a graph (his Fig. 1) as does Horn (1975: 209). In his legend for this figure Horn wrote 'Note that intermediate disturbances produce higher diversity than either very high or very low levels' (Horn 1975: 209). A very clear statement of the intermediate distu ...
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.