Most Popular Posts
Categories
- Biodiversity (45)
- Climate change (137)
- Community-based conservation (45)
- Economics and conservation (113)
- Endangered species (185)
- Fresh water (41)
- Habitat (158)
- Invasive species (76)
- Marine (103)
- Monitoring (198)
- Restoration (133)
- Socio-political issues (148)
- Tools and technology (91)
Archives
- June 2010
- May 2010
- April 2010
- March 2010
- February 2010
- January 2010
- December 2009
- November 2009
- October 2009
- September 2009
- August 2009
- July 2009
- April 2009
- January 2009
- August 2008
- July 2008
- June 2008
- May 2008
- April 2008
- March 2008
- February 2008
- January 2008
- December 2007
- November 2007
- October 2007
- September 2007
- August 2007
- July 2007
- June 2007
- May 2007
- April 2007
- March 2007
- February 2007
- January 2007

Restoration

May

31

2010

Buy Viagra Online Cheap

Forest carbon stocks fluctuate after bark beetle infestation

Buy viagra online cheap, Bark beetles have been decimating forests across North America, killing conifers such as lodgepole pines. Kjøpe viagra, Carbon stocks can plunge after an outbreak but may recover within a few decades, a new study suggests.

The authors focused on a site in Idaho’s Sawtooth National Recreation Area, billig kaufen viagra, Kjøp Discount viagra, which contains various species of pine and fir. About one-third of the area’s lodgepole pines had died from a bark beetle outbreak, Jotta viagra verkossa, Order viagra online, they found, resulting in a loss of 31 to 83 percent of that species’ aboveground carbon stocks, viagra without a prescription. Order viagra no prescription, Bark beetles tend to attack larger trees, so the proportion of carbon removed was larger than just the proportion of killed trees.

Using modelling, North Carolina NC N.C. , Cheap viagra no prescription, the team estimated that it would take 25 or fewer years for carbon stocks to bounce back. The recovery process varied depending on the sizes of the victims and survivors in each plot, cheap viagra, Kjøpe viagra online, according to the study in Global Change Biology. If a plot was left with mostly small trees, those trees took advantage of newly freed resources and grew faster, buy viagra online cheap. But large surviving trees weren’t able to boost their growth rate as much after the epidemic, acheter viagra discount. Billige viagra apotek, – Roberta Kwok

Source: Pfeifer, E.M., order viagra online without prescription, Kansas KS Kans. , Hicke, J.A, Kentucky KY Ky. . Wyoming WY Wyo. , & A.J.H. Meddens, Acheter en ligne viagra. Order viagra no rx, 2010. Observations and modeling of aboveground tree carbon stocks and fluxes following a bark beetle outbreak in the western United States. Global Change Biology DOI: 10.1111/j.1365-2486.2010.02226.x.

Image © GomezDavid, billiga viagra apotek, Comprare viagra sconto, iStockPhoto.com

. παραγγείλετε online viagra. Jotta viagra verkossa. Indiana IN Ind. . Viagra generic.

May

28

2010

Order Viagra Without Prescription

Evenly-spaced termite mounds help African savanna flourish

Puzzle Order viagra without prescription, The termite mounds spread over the African savanna don’t just benefit termites. Acquistare a buon mercato viagra, They also help boost the abundance and reproduction of other animals, scientists say in PLoS Biology.

The team studied a grassland in Kenya that was dotted with 10- to 20-meter-wide termite mounds, Maryland MD Md. . Viagra prices, The farther the researchers got from a mound, the fewer arthropods they found, West Virginia WV W.Va. . Viagra sale, Trees that housed at least one gecko also tended to be located near a termite mound. And female spiders that were caught close to mounds had more spiderlings in their egg sacs than spiders caught farther away.

The regular spacing of the termite mounds is key, generic viagra, Köpa viagra online, according to the study. By running simulations of other landscapes, the researchers concluded that randomly-spaced mounds wouldn’t improve productivity nearly as much as the evenly-spaced mounds, order viagra without prescription. Regular patterns could also be important in other ecosystems and aid landscape restoration, North Dakota ND , Goedkope viagra apotheek, the authors say. – Roberta Kwok

Source: Pringle, halvalla viagra apteekki, Ordering viagra no prescription, R.M. et al, Hawaii HI . Viagra online, 2010. Spatial pattern enhances ecosystem functioning in an African savanna. PLoS Biology 8(5), acquistare online viagra. Viagra discount, DOI: 10.1371/journal.pbio.1000377.

Image © alessandroiryna, iStockPhoto.com

, köpa billiga viagra. Buy viagra overnight delivery. Cheap viagra pills. Cheapest viagra in the world. φτηνές φαρμακείο viagra. Order viagra. Buy cheap viagra. California CA Calif. . Order viagra without prescription. Cheap viagra online legally.

Read more on Habitat, Restoration | Post a Comment

Email This Post

May

4

2010

Buy Propecia

Bald eagles may prey on threatened species

Empty lunch bag Buy propecia, A recovering population of bald eagles in California could adopt a diet that endangers themselves or other species, scientists suggest.

Conservationists have worked for decades to restore bald eagles (Haliaeetus leucocephalus) to the Channel Islands in California, where the birds were largely wiped out in the 1960s. Researchers analyzed prey and eagle remains from San Miguel Island to determine what bald eagles might have eaten when the population was thriving.

Some chicks appeared to have eaten mostly sheep, ordering propecia online legally, Osta propecia online, which were common on the islands’ ranches from about 1850-1950. Other historic and prehistoric bald eagles consumed mainly seabirds or a mix of land and marine animals, propecia over the counter, Köpa rabatterade propecia, the team reports in the Proceedings of the National Academy of Sciences.

Sheep have since been eradicated from the island, and some seabird populations are declining, Um propecia online. Propecia pills, Newly introduced bald eagles could end up eating endangered foxes, vulnerable seabird species, ordering propecia online without prescription, Cheapest propecia in the world, or marine mammals that are contaminated with pollutants, researchers warn, propecia without a prescription. Buy propecia pills, – Roberta Kwok

Source: Newsome, S.D, Om propecia online. Massachusetts MA Mass. , et al. 2010, billige propecia Apotheke. Generic propecia, Pleistocene to historic shifts in bald eagle diets on the Channel Islands, California. Proceedings of the National Academy of Sciences DOI: 10.1073/pnas.0913011107.

Image © Kameleon007, Washington WA Wash. , Acquistare online propecia, iStockPhoto.com

. Minnesota MN Minn. . Hawaii HI . Price of propecia. παραγγείλετε online propecia. Where to buy cheap propecia. Arkansas AR Ark. . Propecia online kaufen. Ordering propecia online cheap. Purchase propecia online.

Email This Post

Mar

6

2010

Buy Soma

Trees and shrubs don’t always diminish streamflow

Tree leaves over stream Buy soma, The conversion of some Texas grasslands into woodlands did not cause a drop in streamflow as many people might have assumed, researchers say.

Overgrazing of U.S. Cheap soma from canada, grasslands has resulted in the spread of woody plants like trees and shrubs. Because trees take up water from deep underground, California CA Calif. , Soma online cheap, it’s commonly thought that they will sap the supply of groundwater that flows into streams. But large-scale studies providing evidence for this idea are sparse, buy soma overnight delivery, Buy soma online legally, according to a paper in press at Geophysical Research Letters.

The team studied an area in Texas called the Edwards Plateau, which has seen an influx of woody plants over the last 50 years and supplies water to towns and farms, cheap soma. Kjøpe billig soma, Analyzing 85 years of data for four rivers, the researchers found that three of the rivers actually showed higher annual streamflow than they had in the past, Minnesota MN Minn. . And the flow of groundwater into streams was nearly two times as high, they report.

Groundwater recharge might have dropped during the initial degradation of the land, the authors say, buy soma. Goedkope soma apotheek, But the arrival of trees and shrubs didn’t make the problem worse. On the contrary, buy cheap soma online, Generic soma, they write, woody plants “may even help reverse such declines” in landscapes similar to the Edwards Plateau. – Roberta Kwok

Source: Wilcox, South Dakota SD , Um soma online, B.P. & Y, Washington WA Wash. . Cheap soma, Huang. 2010, acheter soma. Ordering soma no rx, Woody plant encroachment paradox: Rivers rebound as degraded grasslands convert to woodlands. Geophysical Research Letters DOI: 10.1029/2009GL041929.

Image © Mark_VB, buy soma online, Purchase soma online, iStockPhoto.com

Correction: A previous version of this article implied that the study's findings applied to all grasslands that had been converted to woodlands, not just landscapes similar to the Edwards Plateau, Osta soma. Buy soma c.o.d., The article has been corrected to clarify the results.

. Cheap soma no rx. φτηνές φαρμακείο soma. Billiga soma apotek. South Carolina SC S.C. .

Read more on Fresh water, Restoration | 2 Comments

Email This Post

Jan

11

2010

Order Viagra Free Samples Without Prescription

Order viagra free samples without prescription, When prairie dogs disappear, invasive shrubs move in

Grasslands in northwestern Mexico that harbor endangered species are quickly being invaded by shrubs, thanks to a dramatic drop in the density of prairie dogs.

Mexico's Janos grasslands have been hit by intensive agriculture, over-grazing, and droughts in recent years. The area inhabited by prairie dogs fell by 73% from 1988-2005, För viagra free samples online, Maine ME Me. , and their density dropped from 25 to 2 animals per hectare over roughly the same time period, researchers report in PLoS ONE.

Since prairie dogs help maintain grasslands by clipping and eating the seeds of invasive shrubs, lowest price viagra free samples, Cheap viagra free samples pills, their downturn has allowed shrubland to expand, the team says, Arizona AZ Ariz. . Acheter viagra free samples bon marché, As a result, species that rely on grassland habitat, North Carolina NC N.C. , Cheap viagra free samples without prescription, such as horned larks and cottontail rabbits, also saw declines between 1994-2004.

To bring the grasslands back, New Jersey NJ N.J. , Om viagra free samples online, the researchers are turning to some unconventional allies: the agricultural and cattle industries. Grazing cattle could help clear the land so prairie dogs can move back in, viagra free samples online stores, Kansas KS Kans. , the team says. And short-term intensive farming could remove invasive shrubbery – a task too costly to be completed by conservationists – allowing the area to be later restored to grassland, købe viagra free samples online. Indiana IN Ind. , – Roberta Kwok

Source: Ceballos, G., αγοράσετε viagra free samples έκπτωση, Osta viagra free samples online, Davidson, A., buy viagra free samples without prescription, Buy viagra free samples online legally, List, R., viagra free samples no prescription, Buy viagra free samples c.o.d., Pacheco, J., cheap viagra free samples tablets, Buy viagra free samples online, Manzano-Fischer, P., order viagra free samples, West Virginia WV W.Va. , Santos-Barrera, G., παραγγείλετε online viagra free samples, & Cruzado, J. (2010). Rapid Decline of a Grassland System and Its Ecological and Conservation Implications PLoS ONE, 5 (1) DOI: 10.1371/journal.pone.0008562

Image © fsimeoni, iStockPhoto.com

Read more on Biodiversity, Habitat, Restoration | 1 Comment

Email This Post

Dec

21

2009

Order Cialis Without Prescription

Nutrient enrichment can cut off energy flow in aquatic food webs

Broken chain Order cialis without prescription, The increased nitrogen and phosphorus entering streams can boost the number of "predator-resistant prey," preventing energy from flowing to the top of the food web, researchers say in the Proceedings of the National Academy of Sciences.

Because of human activities, ecosystems are receiving more and more nutrients. Cialis, Some studies suggest that this enrichment will increase the production of both predator and prey species. But other research has raised the possibility that some of those added resources will never make it to the food web’s upper levels.

A team added extra nitrogen and phosphorus to a stream for five years – and got surprising results, Iowa IA . Cheap cialis without prescription, At first, the nutrients seemed to benefit predators as well as prey, Nebraska NE Nebr. . Køb discount cialis, But in the fourth and fifth years, the production of predators dropped off while prey production kept rising.

The break appears to be due to an increase in large prey organisms, cialis online kopen, Order cialis online, the authors say. The predators ate mainly smaller prey and were less likely to consume these bigger specimens, order cialis without prescription. Thus, cialis over the counter, Om cialis online, some of the energy provided by the increased nutrients didn’t reach predator species, making the food web less efficient, comprare cialis sconto, Buy cialis online, the researchers say.

They note that the escaped prey might eventually be snapped up by downstream or terrestrial predators. The results could apply to similar streams around the world, kjøpe cialis, Acheter cialis bon marché, the authors write, and show that higher nutrient levels can have unexpected effects on freshwater ecosystems, ordering cialis online cheap. Cheap cialis no prescription, – Roberta Kwok

Source: Davis, J., ordering cialis online legally, For cialis online, Rosemond, A., acquistare online cialis, Order cialis online without prescription, Eggert, S., cialis en ligne afin, Buy generic cialis, Cross, W., where to buy cheap cialis, Cialis without a prescription, & Wallace, J, För cialis online. Arkansas AR Ark. , (2009). Long-term nutrient enrichment decouples predator and prey production Proceedings of the National Academy of Sciences DOI: 10.1073/pnas.0908497107

Image © pjjones, iStockPhoto.com

Read more on Fresh water, Restoration | Post a Comment

Email This Post

Dec

8

2009

Buy Viagra Online

Wolf pack structure recovers after hunting ban

Family album Buy viagra online, Wolves in Canada’s Algonquin Provincial Park have reassembled into natural packs after a hunting and trapping ban took effect, even though the animals’ numbers have remained steady. Viagra farmacia a buon mercato, The finding, reported in Biological Conservation, ordering viagra online, Viagra generic, suggests that measurements of factors other than population size are needed to shape conservation policy.

Researchers tracked 112 eastern wolves (Canis lycaon) in the park after the government issued a harvest ban in nearby towns. While deaths due to hunting and trapping decreased, Alabama AL Ala. , Louisiana LA , the population density stayed around three wolves per 100 square kilometers, mainly due to deaths by natural causes, Oklahoma OK Okla. . φτηνές φαρμακείο viagra, Analysis of blood samples, however, North Carolina NC N.C. , Iowa IA , showed a dramatic change in wolf pack structure. Before the ban, buy viagra online, Billige viagra Apotheke, 12 out of 15 packs contained unrelated wolves; after the ban, that number dropped to one out of 17 packs.

The newly restored social structure could benefit the population, ordering viagra overnight delivery, Order viagra no rx, the authors say. Studies of other species have shown that tight familial bonds can improve reproduction rates and lower stress, buy viagra online. Conservation policies should “look beyond numbers, comprare viagra, Cheap generic viagra, ” the team argues, and consider social patterns as well, cheap viagra. Idaho ID , – Roberta Kwok

Source: Rutledge, L., billige viagra apotek, Ordering viagra online cheap, Patterson, B., order viagra online, Viagra online, Mills, K., Rhode Island RI R.I. , Illinois IL Ill. , Loveless, K., For viagra online, Ostaa halvalla viagra, Murray, D., & White, B. (2009). Protection from harvesting restores the natural social structure of eastern wolf packs Biological Conservation DOI: 10.1016/j.biocon.2009.10.017

Image © wragg, iStockPhoto.com

Email This Post

Nov

17

2009

Generic Viagra

Darwin’s specimens aid efforts to save Galápagos mockingbird

Generic viagra, Charles Darwin may have long gone to his grave, but specimens that he collected in the early 1800s are helping today’s conservationists rescue a dwindling mockingbird species on the Galápagos Islands.

The Floreana mockingbird, Mimus trifasciatus, caught Darwin’s eye during his 1835 trip to Galápagos on the HMS Beagle. Utah UT , He and Beagle captain Robert Fitzroy collected specimens of the birds, which later ended up at the Natural History Museum in London, order viagra c.o.d.. Om viagra online, Darwin’s observations of differences among Galápagos mockingbird species are believed to have triggered his initial thoughts on evolution.

Since then, the Floreana mockingbird has been driven to extinction on Floreana Island and remains only on two small nearby islets, cheap generic viagra, Cheap viagra online, Champion and Gardner-by-Floreana. A recovery plan is in the works, cheap viagra online cheap, Cheap viagra online, but the history of the two islet populations has been unclear. If they have been evolving separately for thousands of years, Um viagra online, Buy viagra cod, conservationists might want to preserve each group independently. If they diverged recently, it might be better to bring birds from the two populations back together.

To settle the question, a research team examined Floreana mockingbird specimens taken from the two islets in 2006-2008 and 1905-1906, as well as Darwin and Fitzroy’s Floreana Island specimens from 1835, generic viagra. DNA analyses suggested that the Champion and Gardner birds began independently evolving only 270 and 450 years ago, purchase viagra, Ordering viagra from canada, respectively. Some of the genetic variations found in Darwin’s Floreana Island specimens had been retained on Champion but not Gardner, Kansas KS Kans. , Kjøpe viagra online, and vice versa.

Conservationists should therefore introduce birds from both islets to Floreana as part of the recovery effort, the team writes in Biology Letters, Rabatt kaufen viagra. Köpa viagra, The Champion birds show high levels of inbreeding, and mixing the two populations would benefit the species by increasing genetic variation, viagra without a prescription, Ohio OH , says study co-author Lukas Keller of the University of Zurich. In the paper’s acknowledgments, Keller’s team thanks Darwin and Fitzroy for their contribution, Um viagra online. Cheap viagra no rx, “We coudn’t resist,” he says, buy viagra no prescription. Montana MT Mont. , – Roberta Kwok

Source: Hoeck, P., order viagra online, Online viagra, Beaumont, M., For viagra online, Generic viagra, James, K., Grant, R., Grant, P., & Keller, L. (2009). Saving Darwin's muse: evolutionary genetics for the recovery of the Floreana mockingbird Biology Letters DOI: 10.1098/rsbl.2009.0778

Email This Post

Sep

28

2009

Ordering Viagra

Artificial meandering river provides insight into stream restoration

Meandering river Ordering viagra, Scientists have figured out how to make a river meander in the lab, according to a report in the Proceedings of the National Academy of Sciences. Viagra sale, The research could help determine the best strategies for stream restoration.

The team carved an artificial stream bed with one bend into a 17-meter-long basin filled with sand. They planted alfalfa sprouts on the sides to strengthen the banks, viagra farmacia a buon mercato, Comprare viagra sconto, then ran water through the channel for 136 hours. By the end, Om viagra online, Kjøpe viagra, the river had developed five bends and appeared to function like a natural meandering stream.

One key element was the use of sand to plug small channels along the sides of the river, the authors say, Michigan MI Mich. . Koop korting viagra, This goes against a common practice in stream restoration projects, which often aim to eliminate fine sediment, ordering viagra online. Maintaining stream bank strength with vegetation was also critical, the team notes.

Now that scientists have a working lab version of a meandering river, they can test different stream restoration techniques and build computational models of the process, says lead author Christian Braudrick, ordering viagra. Acheter viagra, Researchers could then use the models to predict how streams will change over the course of decades, rather than just a few years, viagra without a prescription. Ordering viagra without prescription, – Roberta Kwok

Source: Braudrick, C., order viagra online cheap, Order viagra no prescription, Dietrich, W., kjøpe billig viagra, Tennessee TN Tenn. , Leverich, G., cheap viagra no prescription, Comprar viagra, & Sklar, L, South Carolina SC S.C. . Buy viagra cheap, (2009). Experimental evidence for the conditions necessary to sustain meandering in coarse bedded rivers Proceedings of the National Academy of Sciences: 10.1073/pnas.0909417106

. Cheap viagra online legally. Billiga viagra apotek. Acheter en ligne viagra. Cheapest viagra in the world.

Read more on Fresh water, Habitat, Restoration | Post a Comment

Email This Post

Aug

18

2009

Ordering Viagra Online Legally

Indian subcontinent harbors much of the tiger's genetic diversity

Map of India Ordering viagra online legally, India and its surrounding nations are key to the survival of the tiger, scientists say in a PLoS Genetics study. Montana MT Mont. , According to a new analysis, Indian tigers hold more than half of the species’ genetic diversity.

Tiger numbers have dwindled to just 3, acquistare a buon mercato viagra, Michigan MI Mich. , 000 in the wild, with about 60 percent of them living on the Indian subcontinent, comprar en línea viagra. Viagra no prescription, But genetic testing of Indian tigers has been limited, partly due to the challenge of collecting blood and tissue specimens.

The authors analyzed the droppings of 71 tigers, cheap viagra, Buy viagra online without prescription, as well as two tissue samples, from 28 reserves across the Indian subcontinent, acheter viagra. Kaufen viagra, Indian tigers have higher genetic diversity than other wild tigers, they found, Idaho ID , Ordering viagra online, capturing more than 60 percent of the species’ variation. Computer simulations suggested that about 58,200 tigers used to roam peninsular India, order viagra no prescription, Where to buy cheap viagra, which might explain why the area's tigers retain so much diversity today.

Conserving Indian tigers won’t be easy, the authors acknowledge, παραγγείλετε online viagra, Ostaa halvalla viagra, since most remaining habitat is fragmented into small patches. But the fact that Indian tiger diversity has withstood the pressures of a billion-plus people “provides some hope for species survival in the future, ordering viagra online cheap, Buy viagra online cheap, ” they say. – Roberta Kwok

Source: Mondol, S., Karanth, K.U., and U, ordering viagra online legally. Ramakrishnan, price of viagra. Kjøp Discount viagra, 2009. Why the Indian subcontinent holds the key to global tiger recovery, Illinois IL Ill. . New Mexico NM N.Mex. , PLoS Genetics DOI: 10.1371/journal.pgen.1000585

, Connecticut CT Conn. . Viagra generic. Billig kaufen viagra. Cheap viagra pills.

Email This Post

keep looking »

Most Popular Posts

Categories

Archives

May

31

2010

May

28

2010

May

4

2010

Mar

6

2010

Jan

11

2010

Dec

21

2009

Dec

8

2009

Nov

17

2009

Sep

28

2009

Aug

18

2009

Blogroll

Search by Journal Title