Sentences with phrase «in species richness»

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.

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.

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

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.

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

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

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.

Fifty - nine of the one hundred biological communities showed an increase in species richness and 41 a decrease.

Not exact matches

The weird creatures in the depths of the oceans, the ichthyosaurs, pterosaurs and other extinct species, the enormous varieties of plants, insects, crustaceans, reptiles, fish and mammals — all of this makes us wonder whether chance might not be as good an «explanation» as any for the morphological richness of life.

The main findings were that there was an increased abundance and species richness of native fish compared to drought years (2005 - 2009) and Commonwealth environmental water contributed to increased base flows in the river channel, increasing hydraulic diversity for native fish.

With regard to pollinators, which greatly benefit from a richness of flowers, the fact that flowering weeds are more diverse and more abundant in organic arable fields and in organic grassland compared to conventional fields, where only few species and numbers were found, is particularly important.

A study in California comparing conventional with organic tomato fields showed a higher abundance of natural enemies and greater richness of species in organic tomato fields.

By graphing, analyzing, and comparing data, students will determine species richness and biodiversity in the two areas.

The study also shows significant differences between the parks in terms of species richness.

«The ecosystem is recovering but has not reached its original state, because in undisturbed tropical lowland forests the species richness is estimated at more than 200 species per hectare.

Findings in the paper, «Worldwide Evidence of a Unimodal Relationship between Productivity and Plant Species Richness,» reveal a consistent biological rule governing the link between plant biomass and species richness in grassland ecosystems — plant species diversity is generally greatest at intermediate levels of plant bSpecies Richness,» reveal a consistent biological rule governing the link between plant biomass and species richness in grassland ecosystems — plant species diversity is generally greatest at intermediate levels of plant Richness,» reveal a consistent biological rule governing the link between plant biomass and species richness in grassland ecosystems — plant species diversity is generally greatest at intermediate levels of plant bspecies richness in grassland ecosystems — plant species diversity is generally greatest at intermediate levels of plant richness in grassland ecosystems — plant species diversity is generally greatest at intermediate levels of plant bspecies diversity is generally greatest at intermediate levels of plant biomass.

«In a corn production system, simply increasing cover - crop species richness will have a small impact on agroecosystem services, but designing mixtures that maximize functional diversity may lead to agroecosystems with greater multifunctionality.»

The unprecedented increase in alien species numbers can lead to an increase in regional species richness.

Although overall tree species richness did not change over the two decades of the study, the type of species that predominated at the edges changed radically: from specialized trees capable of persisting in the dark understory to so - called generalist species.

The Atlantic Forest is a hotspot of biodiversity and one of the most species richness biome of anurans (frogs, tree - frogs, and toads) in the world.

«Since we held species richness constant, we know that each species» ecological roles — the jobs in the food web — are the key factors influencing big - picture stability.

In this case, habitats get smaller with increasing altitude, and their species richness is predicted to decrease, leading biodiversity to peak at foot of the cone and steadily decrease with elevation.

By comparing this historical data for 21 sites across England with recent pollinator records and land cover maps, they found that 85 % of sites had suffered declines in pollinator species richness of between 10 and 50 % over the past 80 - 100 years.

The region in which the research was conducted, the Madre do Dios section of the Peruvian Amazon, is an area of extraordinary biological richness, with many species restricted to the forests between two large rivers.

To overcome this obstacle, we compiled and standardized species - level data on more than half a million trees in 1170 plots sampling all major lowland forest types to explore patterns of commonness, rarity, and richness.

Here, we provide empirical data on the commonness, rarity, and richness of lowland tree species across the entire Amazon Basin and Guiana Shield (Amazonia), collected in 1170 tree plots in all major forest types.

Leprieur also expresses amazement «that natural processes are blurred by human activities in controlling the richness of nonnative freshwater fish species.»

«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.

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

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.

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

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.

In short, «we couldn't imagine that many of the species flying in Europe, particularly in the Iberian Peninsula, would hide such genetic richness, which suggests the existence of cryptic species,» adds the scientist at the University ValenciIn short, «we couldn't imagine that many of the species flying in Europe, particularly in the Iberian Peninsula, would hide such genetic richness, which suggests the existence of cryptic species,» adds the scientist at the University Valenciin Europe, particularly in the Iberian Peninsula, would hide such genetic richness, which suggests the existence of cryptic species,» adds the scientist at the University Valenciin the Iberian Peninsula, would hide such genetic richness, which suggests the existence of cryptic species,» adds the scientist at the University Valencia.

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

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

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

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.

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.

Richness of species diversity in the forest and it is the second largest in the world, and just defeated the Amazon rainforest in Brazil.

Lake Manyara, a small breathtaking National Park with an immense natural richness is home to over 380 bird species and the famous tree - climbing lions, which for reasons unknown sleep in the branches of acacia trees.

This gives Bali a richness in species diversity that is hardly seen anywhere else in the world.

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

One study, published recently in Nature journal, tried to make an audit of the richness of life in the soil: there could be up to 9,000 different species of bacteria in a cubic centimetre, more than 200 different kinds of fungi in a gram of soil, and the total numbers of these microbes would add up to billions.

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.

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.

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., 2006In 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., 2006in reduced fish species richness, local extinctions and loss of species within key functional groups of reef fish (Sano, 2004; Graham et al., 2006).

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

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).