Sentences with phrase «plants terrestrial plants»

annual plants terrestrial plants that complete their life cycle in one growing season; plants that die off each year during periods of temperature and moisture stress but leave behind seeds to germinate during the next favorable climatic season

Not exact matches

The value of sacramental images of hope is that they keep our religious life firmly planted on the terrestrial ground from which we have ourselves sprung.

Comprised of carbon and hydrogen, in closed growing environments, like on a spacecraft or in a terrestrial greenhouse or a land - base perishable cooler, ethylene builds up rapidly and causes plants to mature too quickly.

Most terrestrial plants enter into biocoenosis with funghi.

Tough lignin, which helps form the main part of woody tissue, is the second most common component of terrestrial plants.

Balmy ocean waters are putting the squeeze on phytoplankton, tiny plants that collectively fix as much carbon dioxide as all terrestrial greenery combined.

WHEN the greening of the land began around 450 million years ago, the first terrestrial plants were tiny.

This global biological recordbased on daily observations of ocean algae and land plants from NASAs Sea - viewing Wide Field - of - View Sensor (SeaWiFS) missionwill enable scientists to study the fate of atmospheric carbon, terrestrial plant productivity and the health of the oceans food web.

Using data from several sources on 162 terrestrial animals and plants unique (endemic) to the Albertine Rift, the researchers used ecological niche modeling (computer models) to determine the extent of habitat already lost due to agriculture, and to estimate the future loss of habitat as a result of climate change.

Staking out a different kind of property claim, a Russian submarine planted that nation's flag at the bottom of the Arctic Ocean, at the terrestrial North Pole, in 2007.

In a widely cited paper in 2004, Thomas and colleagues estimated that 15 to 37 per cent of terrestrial plant and animal species will be «committed to extinction» by 2050 (Nature, vol 427, p 145).

In recent years our incredibly varied geology has provided the oldest known vascular land plants, evidence of the oldest herbivores, as well as the earliest examples of terrestrial footprints («Did centipedes take the first steps on terra firma?»

Other researchers have shown that some terrestrial plants make compounds that inhibit reproduction in herbivores, but «this type of interaction was not known for marine environments,» says Ianora.

Given the dearth of terrestrial plants on islands in the Gulf of California, Polis and Hurd set out to discover where the energy in the spiders» food came from.

They are ancestors to terrestrial plants, which seem to have evolved from certain ocean phytoplankton hundreds of millions of years ago.

42 %: terrestrial animal and plant species with known trends that have declined in population size the last decade

Seagrasses evolved from terrestrial plants into marine foundation species around 100 million years ago.

«To cause this type of global isotopic shift, you'd have to take all terrestrial plants and burn them into carbon dioxide,» Kessler says, which seems unlikely.

«Bromide is everywhere in the soil, so it is likely that terrestrial higher plants take it up into their leaves and act as a significant source of methyl bromide worldwide,» says team leader Jianying Gan.

The Norian Chinle Formation in the Southwestern United States provides a snapshot into an ancient terrestrial ecosystem with its famous petrified tree trunks and various plant and vertebrate remains.

The floral turnover may have affected terrestrial vertebrate communities as the loss of wetland habitat space and an increase in arid climate adapted plants may have dwindled the supply of palatable vegetation for herbivores.

Electric currents that flow into and out of the ionosphere, which AMPERE monitors, have various effects on it as well as the atmosphere in general that can cause problems with tracking LEO space debris, the use of GPS systems, and even terrestrial power plants — as was the case when a geomagnetic storm took down Quebec's power grid in 1989, Anderson says, adding, «The operators didn't know what was happening.»

Long roots, said Glover as he unfurled the 10 - foot roots of a native big bluestem plant, are «our terrestrial system's safety net.»

Many uncultured microbes play unknown roles in regulating Earth's biogeochemical processes; everything from regulating plant health to driving nutrient cycles in both terrestrial and marine environments, processes that can impact global climate.

As a result of this annual cycle, together with the continual emissions from fossil fuel burning (particularly over China, Europe, and the southeast United States), carbon levels reach a maximum in the Northern Hemisphere in April, just before terrestrial plants begin to soak up more carbon.

Ice - free areas of Antarctica — home to more than 99 per cent of the continent's terrestrial plants and animals — could expand by more than 17,000 km2 by the end of this century, a study published today in Nature reveals.

This doubling may help answer how flowering plants «came to rule the terrestrial landscape,» he says.

The government is counting its chickens before they are hatched, says Fernando Valladares, a plant ecologist at the National Museum of Natural Sciences in Madrid who is president of the Spanish Association for Terrestrial Ecology and who, with other scientists, critically analyzed the draft strategy.

«We now know a fair amount about the terrestrial animals and plants that were living in the Eocene Arctic greenhouse period,» said Eberle.

Her work includes analysis of pond sediments, soils, and more collecting to document plant diversity... We're also hoping to cast a broader net across Providence with an analysis of historical specimens of Plantago [plantain] in an attempt to match terrestrial trends in heavy metal concentration with measurements taken from nearby marine sediments in Narragansett Bay [south of Providence].»

And much like humans, fish diets require omega - 3 fatty acids, not found in terrestrial plants.

«[This] study has important global implications, because we know early plants cooled the climate and increased the oxygen level in the Earth's atmosphere,» conditions that supported the expansion of terrestrial animal life, says Tim Lenton, an earth system scientist at the University of Exeter in the United Kingdom who was not involved with the work.

This waterproof film, a very ancient adaptation to terrestrial life, prevents excessive water loss and protects plants against insects and various pathogens.

Seeds have thus recycled an ancient terrestrial plant protection mechanism that allows their leaves to be covered with an impermeable film preventing excessive transpiration.

Having emerged late during evolution, seeds have transformed many plants into miniature travelers, contributing greatly to their colonization of terrestrial habitats.

Cory Cleveland, a UM professor of terrestrial ecosystem ecology, said that previous research in the wet tropics — where much of global forest productivity occurs — indicates that the increased rainfall that may occur with climate change would cause declines in plant growth.

In the above citied letter to Nature the authors concluded out of their experiments: «Here we demonstrate using stable carbon isotopes that methane is readily formed in situ in terrestrial plants under oxic conditions by a hitherto unrecognized process.»

His research interests were in the areas of marine and terrestrial plant physiology and ecology.

Comment on: Keppler et al., Methan emissions from terrestrial plants under aerobic conditions, Nature 439, 187 - 191 (12 January 2006)

Walls that are covered in plants could increase the overall stocks of biomass, and thus the proportion of of carbon stored in terrestrial ecosystems compared to in the atmosphere.

Sauropod remains have been found on every continent, and they were one of the most important groups of terrestrial giant plant eaters, or megaherbivores, throughout the Jurassic and Cretaceous periods (201 million to 66 million years ago).

Sitch, S., et al., 2003: Evaluation of ecosystem dynamics, plant geography and terrestrial carbon cycling in the LPJ dynamic global vegetation model.

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Ignoring terrestrial carbon led to a nearly complete loss of unmanaged forests by 2100, largely because they were replaced by massive expansions of bioenergy crops that were planted to reduce the use of fossil fuels.

«For 20 million years, from the early Neogene approximately 23 million years ago until the Pleistocene started around 2 million years ago, this rule applied: The larger the amount of biomass produced by plants, the higher the diversity of terrestrial mammals that evolved.

Based on 14,000 fossils, the scientists reconstructed the diversity of terrestrial large mammals and compared it with data on the biomass production of plants during the same time period.

For more than 20 million years, the ups and downs of diversity in terrestrial large mammals were determined by primary production, i.e. net production of plant biomass.

They studied terrestrial plant waxes, a layer on the plant's surface protecting against dehydration and microbial attack, which are preserved in the sediment.

It is possible to reconstruct past precipitation changes by measuring the stable hydrogen isotopic composition in terrestrial plant waxes because rainfall is the primary source of hydrogen stored in plant material.

Besides primitive plants, the Rhynie Chert has yielded of algal, fungi, and prokaryotic bacteria fossils as well as a diversity of early terrestrial arthropods such as Myriapods (millipedes and centipedes), Collembola, and Arachnids such as Opiliones (harvestmen), pseudoscorpions and the extinct, spider - like trigonotarbids.