Sentences with phrase «species richness»

Conversion to oil palm will drastically reduce species richness (recent research has shown that conversion of primary rainforest to an oil palm plantation results in a loss of more than 80 percent of species).

«Current conservation priorities are calculated on the basis of species richness, endemism [geographical uniqueness] and threats,» said Budd.

Anthropogenic global patterns of plant species richness, species loss, invasions, crops and ornamental species, anthromes, and terrestrial biomes

Coastal areas and nations dependent upon fishing for food and revenue are likely to suffer as well, the report said, with broad changes in marine species richness and fisheries catch potential as warming and increasingly acidic seas cause species to move to different parts of the ocean.

Therefore, underlying changes in species richness are not accounted for, and the simultaneous free dispersal of PFTs is assumed (e.g., Neilson et al., 2005; Midgley et al., 2007).

Projected range shifts of mammal species will be limited by fragmented habitats and human pressures, as suggested in the TAR, with declines in species richness likely, especially in protected areas.

Globally, biodiversity (represented by species richness and relative abundance) may decrease by 13 to 19 % due to a combination of land - use change, climate change and nitrogen deposition under four scenarios by 2050 relative to species present in 1970 (Duraiappah et al., 2005).

Groundwork began to be laid for a biodiversity - monitoring satellite mission that would use the chemical signatures of plants to discern species richness.

Bioclimatic niche - based modelling studies project reduced endemic species» geographical ranges and species richness in the Cape Floristic region (Midgley et al., 2002, 2003, 2006).

Species richness and fisheries catch potential are projected to increase, on average, at mid and high latitudes (high confidence) and decrease at tropical latitudes (medium confidence).

«But few studies examine how tree diversity - species richness and / or stand composition - affects carbon storage in these plantings.

In the longer term, there may be serious consequences for fisheries production that result from loss of coral communities and reduced structural complexity, which result in reduced fish species richness, local extinctions and loss of species within key functional groups of reef fish (Sano, 2004; Graham et al., 2006).

Most climate change scenarios foresee a shift or expansion of the ranges of many species of plankton, fish and invertebrates towards higher latitudes, by tens of kilometres per decade, contributing to changes in species richness and altered community composition.

Recent changes in the distribution of species as well as species richness within some marine communities and the structure of those communities have been attributed to ocean warming.

Overall there's been remarkably little change in terms of species richness — the number of species present — in a particular elevational band, according to the researchers.

This could precipitate habitat loss for many species, and ultimately, «massive» changes in species richness and abundance.

Comparative analysis of glacial and nival streamflow regimes with implications for biotic habitat quantity and fish species richness.

Summed range maps for all 2387 endemic species indicate that species richness peaks at 621 species (Fig. 2A).

The main result: humans have caused a net increase in plant species richness across two - thirds of the terrestrial biosphere, mostly by facilitating species invasions.

Malcolm's study concludes that, in addition to such massive reductions in biomass, decreases in «species richness, and consequent changes to ecological processes» could occur.

The marine fauna and flora are generally the same as that found throughout the Indo Pacific area, though species richness is very high, notable marine mammals include blue whale (Balaenoptera musculus) and sperm whale (Physeter catodon) as well as 10 species of dolphin, dugong (Dugong dugon) and five species of sea turtles.»

Species richness, evenness and Simpson's index 4.

Plants share relationships with climatic conditions both on local and global scales, hence the levels of species richness are finely balanced with the climatic conditions within both time and space.

Relationships between species richness, evolutionary diversity, and aboveground live tree biomass across.

Deforestation threatens species richness in streams (17/12/2014) A loss of forested areas can lead to a decrease in species richness in adjacent streams.

Apparently, reisolation affects the number of birds using fragments more than it affects species richness.

Bivariate plots showing areas with highest logged proportions (relative to species richness) of species that are climate change vulnerable only in yellow, threatened only in blue, and both highly climate change vulnerable and threatened in maroon.

We also aim to explore the relationship between the species richness of a clade and the developmental properties of the taxa.

The specific antibiotics associated with the lowest species richness were drugs called meropenem, cefotaxime and ticarcillin - clavulanate.

Life in the collision zone: Mountains trigger biodiversity (27/02/2013) For a long time it was assumed that stable environments lead to higher species richness, as they allow speciation.

Diversity within diversity: parasite species richness in poison frogs Poison frogs use toxins against vertebrate predators, bacteria and mosquitoes.

Species richness variability is owed...

Species richness variability is owed... AmphibiaWeb

Species richness, beta diversity, and reproductive traits of amphibians in Ecuador The region of the western Amazon and foothill of the Andes is home to the highest anuran biodiversity, and understanding how its... AmphibiaWeb

As a new study highlights, deforestation in this area might result in a loss of species richness in adjacent streams.

«Connecting the proximate mechanisms responsible for organismal diversity to the ultimate causes of latitudinal gradients in species richness.»

Available evidence from herbaceous systems indicates mixed effects of species richness on biomass stability to extremely wet and dry events.

Higher plant species richness is not always sufficient to reduce ecosystem vulnerability to climate extremes, as shown in a comprehensive literature analysis published in the Journal of Ecology.

Finally, species richness may not be the most relevant indicator of «biodiversity» when studying biodiversity - stability relationships.

The resulting data allowed generation of an expected species richness curve from different points in time.

Aquatic species richness and abundance can decline, and in extreme cases salinization can prevent lakes from mixing - causing low oxygen conditions that smother aquatic life and reduce water quality.

«Our findings show that the functioning of natural and complex ecosystems is ultimately determined by simple relationships: the higher the number of individual animals and the higher the species richness, the better the system functions.»

Despite the extensive effort to date, however, the species richness of the region remains by far underestimated.

But the subtle, molecular - level differences unveiled by the DNA analyses tipped the scale well in favor of species richness for tropical mayflies.

«At the very least, determining the additional carbon storage value gained with species richness should be taken into account in comparing different land use management options,» the researchers wrote.

«Due to the sensitivity of mycoheterotrophic plants it has long been suggested that their species richness provides a useful indicator of the overall floral diversity of forest habitats.

«What we show is that the decrease in species richness with decreasing area gets steeper when you climb up the food chain.

Species richness therefore leads to greater security,» Schneider sums up.

True crabs as a group are comparably young, starting to diversify only about 100 million years ago (mya), with a dramatic increase in species richness beginning approximately 50 mya — though the early evolution of crabs is still very incompletely known.

«It also means we can improve regional species richness.