Sentences with phrase «species change observed»

Not exact matches

Evolution is simply the observed changes in species over time as they adapt and improve to survive.

The changes are extremely gradual, they can not be observed over the short time span of human civilization so far, and the term «species» is a man - made concept to make categorization of life forms convenient... it is not an immutable feature of the natural world as you seem to think it is.

The theory is beautifully consistent with what is observed in the natural world though, and it is possible to observe species, including humans, continue to evolve in response to changing environmental pressures.

In both species, significant reductions in epigenetic drift were observed, such that age - related changes in methylation in old animals on the calorie - restricted diets were comparable to those of young animals.

By observing how the genes changed during the course of embryonic development, scientists could track the emergence of a novel physical trait, the first step toward the creation of a new species.

Given widespread observation of habitat change and individual species declines — and knowing that extinction rates are many times higher than normal — the scientists predicted a drop, over time, in the number of species observed in most of these studies.

The authors did not directly compare the observed morphological changes to those of other frog species.

Since changes in the soil nitrogen cycle are driven by microbes, could bacteria associated with invasive species not only be responsible for the observed changes in soil nutrient concentrations, but also for enabling the continued growth and persistence of the invader species?

«Eavesdropping on Bering Strait marine mammals: Researchers are eavesdropping on marine mammals within the Bering Strait via «passive acoustic monitoring» to observe changes in the ecology of the Pacific Arctic by documenting the use of this region by species previously excluded by sea ice.»

To this end, they observe various facets of biodiversity, such as the size of populations, the characteristics of species or the functioning of ecosystems and analyse how they change.

Using occupancy modeling to control for variation in detectability, we show substantial (∼ 500 meters on average) upward changes in elevational limits for half of 28 species monitored, consistent with the observed ∼ 3 °C increase in minimum temperatures.

Researchers observed that consuming emulsifiers drastically changed the species composition of the gut microbiota in a manner that made it more pro-inflammatory, creating a niche favoring cancer induction and development.

They observed that emulsifier consumption changed the species composition of the gut microbiota and did so in a manner that made it more pro-inflammatory.

After running the global simulation several times with different combinations of responses for the 96 species, the researchers observed that as ocean acidification prompted some species to grow faster, and others slower, it also changed the natural competition between species.

The extreme phenotypic diversity observed among modern domestic dogs is unique among mammalian species, and as such, it offers unique insight regarding both the constraints and potential of evolutionary change under domestication.

But only a handful of the 300 or so known species of octopus have even been observed, so that could change.

«It's amazing that something we now take for granted, cooking, was such a transformational technology which gave us the big brains that have made us the only species to study ourselves and to generate knowledge that transcends what was observed firsthand; to tamper with itself, fixing imperfections with the likes of glasses, implants and surgery and thus changing the odds of natural selection; and to modify its environment so extensively (for better and for worse), extending its habitat to improbable locations.»

Specifically, researchers observed a reduction of reactive oxygen species; increase in collagen, which strengthens the fibrous cap; and reduction of the plaque necrotic core, and these changes were not observed in comparison with the free peptide or empty nanoparticles.

By extension, because flowering and leaf - out times are highly correlated for many species [36], [37], we hypothesize that yet earlier flowering times, and potentially leaf out times, will continue to be observed in the face of predicted climate change.

«Those who work on the ocean day - to - day live with effects of small changes in climate, while observing the subsequent changes in habitat and species behaviors.

There is increasing evidence that farmers in some regions are already adapting to observed climate changes in particular altering cultivation and sowing times and crop cultivars and species.

The waxing or waning of any given coral species the researchers observed as they moved along the coastline occurred independently of changes to other coral species.

However, only a small fraction of observed species extinctions have been attributed to climate change — most have been ascribed to non-climatic factors such as invasive species, overexploitation, or habitat loss (Cahill et al., 2013).