Sentences with phrase «pattern of ecosystem change»

Joël Guiot and Wolfgang Cramer report in the journal Science that they sifted the evidence from pollen cores and other telltale climatic indicators and modelled the pattern of ecosystem change through the Neolithic, the Bronze Age and recorded human history.

that they sifted the evidence from pollen cores and other telltale climatic indicators and modelled the pattern of ecosystem change through the Neolithic, the Bronze Age and recorded human history.

Not exact matches

As with climate change, the only pragmatic option is to concentrate efforts to fulfil people's desires and demands in a way that protects natural ecosystems as far as possible — not to try to challenge patterns of consumption per se by insisting that they are unsustainable, even if this appears to be the case in the short term.

Lead author Hilary Dugan, a limnologist at the University of Wisconsin - Madison and former Cary Institute of Ecosystem Studies Postdoctoral Fellow, explains, «We compiled long - term data, and compared chloride concentrations in North American lakes and reservoirs to climate and land use patterns, with the goal of revealing whether, how, and why salinization is changing across broad geographic scales.

Dr Robert Marchant, Reader in the University's Environment Department, said: «An understanding of the long - term history of faunal change allows us to identify patterns in the interplay of natural and anthropogenic factors that have shaped Zanzibar's ecosystems today.

Key weather and climate drivers of health impacts include increasingly frequent, intense, and longer - lasting extreme heat, which worsens drought, wildfire, and air pollution risks; increasingly frequent extreme precipitation, intense storms, and changes in precipitation patterns that lead to drought and ecosystem changes (Ch.

As the journey begins, a silky female voiceover explains the core tenets of the New Protocol — the need to elaborate a new «spiritual relationship with the universe of pattern, matter and energy we call home» in an era where «religious extremism has turned into apocalyptic death cults» and belief in the afterlife means it is pointless to worry about climate change and endangered ecosystems.

As Gary traveled the world as a photojournalist, he often photographed and wrote about scientists unlocking mysteries of the natural world and he began seeing a pattern: across disciplines, scientists were realizing that Earth's climate was changing and affecting the organisms and ecosystems that they were studying.

Joseph Bast, who works with the group, highlighted some of the group's conclusions in Forbes: There is little risk of global food insecurity owing to higher levels of CO2, as higher CO2 will greatly aid plant productivity; «No changes in precipitation patterns, snow, monsoons, or river flows that might be considered harmful to human well - being or plants or wildlife have been observed that could be attributed to rising CO2»; and little risk to aquatic or dry - land ecosystems.

Key weather and climate drivers of health impacts include increasingly frequent, intense, and longer - lasting extreme heat, which worsens drought, wildfire, and air pollution risks; increasingly frequent extreme precipitation, intense storms, and changes in precipitation patterns that lead to drought and ecosystem changes (Ch.

«The authors write that «the El Niño - Southern Oscillation (ENSO) is a naturally occurring fluctuation,» whereby «on a timescale of two to seven years, the eastern equatorial Pacific climate varies between anomalously cold (La Niña) and warm (El Niño) conditions,» and that «these swings in temperature are accompanied by changes in the structure of the subsurface ocean, variability in the strength of the equatorial easterly trade winds, shifts in the position of atmospheric convection, and global teleconnection patterns associated with these changes that lead to variations in rainfall and weather patterns in many parts of the world,» which end up affecting «ecosystems, agriculture, freshwater supplies, hurricanes and other severe weather events worldwide.»»

While the effects of higher temperatures are still poorly understood, scientists are concerned that climate change could have a major impact on weather patterns, the distribution of ice, ecosystems, and ocean currents and sea levels.

Overall, climate change will lead to large - scale shifts in the patterns of marine productivity, biodiversity, community composition and ecosystem structure.

It is unknown whether the ecosystem will return to the pattern of decadal - scale change exhibited in previous decades, or how polar bears and seals will respond to ecological changes in the future, but research on these topics is a high priority.

Scientists have recently observed major changes in these glaciers: several have broken up at the ocean end (the terminus), and many have doubled the speed at which they are retreating.2, 5 This has meant a major increase in the amount of ice and water they discharge into the ocean, contributing to sea - level rise, which threatens low - lying populations.2, 3,5 Accelerated melting also adds freshwater to the oceans, altering ecosystems and changing ocean circulation and regional weather patterns.7 (See Greenland ice sheet hotspot for more information.)

SEARCH Science Brief: Climate Change and the Permafrost Carbon Feedback SEARCH Science Brief: A Warming Arctic Threatens Rural Community Resilience SEARCH Science Brief: Effects of the Arctic Meltdown on U.S. Weather Patterns SEARCH Science Brief: Rapid Arctic Environmental Change Disrupts Marine Ecosystems SEARCH Science Brief: Disappearing Sea Ice Fuels Greenland Melt SEARCH Science Brief: Diminishing Arctic Sea Ice SEARCH Science Brief: Arctic Land Ice is Decreasing

Not only will climate change directly impact forests and the other natural systems that maintain critical water - related ecosystem services, climate impacts will be experienced largely through the medium of water — melting glaciers, changing rainfall patterns, increased water stress and drought from higher temperatures, more severe storms — resulting in increased water and food insecurity, and constraints on economic opportunity.

It's more than climate change; it's also extraordinary burdens of toxic chemistry, mining, depletion of lakes and rivers under and above ground, ecosystem simplification, vast genocides of people and other critters, etc, etc, in systemically linked patterns that threaten major system collapse after major system collapse after major system collapse.

Human populations and their use of land have now transformed ecosystem pattern and process across most of the terrestrial biosphere (1, 2), causing major global changes in biodiversity (3), biogeochemistry (4 ⇓ — 6), geomorphic processes (7), and climate (8).

The positive effects of climate change — such as longer growing seasons, lower natural winter mortality, and faster growth rates in higher latitudes — may be offset by negative factors such as changes in established reproductive patterns, migration routes, and ecosystem relationships.

Thus, predictions of future trajectories of pH in coastal ecosystems are still highly uncertain even though model predictions can provide reliable predictions for the future trajectories of open - ocean pH and, thereby, the open - ocean end - member affecting coastal pH. Moreover, we argue that even the expectation that the component of coastal pH change associated with OA from anthropogenic CO2 will follow the same pattern as that in the open ocean is not necessarily supported.

According to Francis Chan, a marine ecologist at OSU, this recurrent dead zone is just another sign of global warming's harmful impact on ocean ecosystems around the world — prompted by unprecedented changes in wind patterns and water currents.

«African rainforests already have the lowest rainfall of any rainforest ecosystem on Earth, which could make them particularly sensitive to changes in local weather patterns,» said Garcia - Carreras.

The field of conservation biology identifies four objectives that must be achieved to ensure the longterm viability of an ecosystem: 1) all native ecosystem types must be represented in protected areas; 2) populations of all native species must be maintained in natural patterns of abundance and distribution; 3) ecological processes such as hydrological processes must be maintained; and 4) the resilience to short - term and long - term environmental change must be maintained.

[60] Aboriginal and Torres Strait Islander cultural knowledge plays a role in environmental management including preserving ecosystems and understanding patterns of climate change.