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Tropical forest carbon absorption may hinge on an odd couple

By Guest PostOctober 7, 2013Environmentabsorb, atmosphere, carbo loading bacteria, carbon absorption, carbon dioxide, carbon sink, component of biodiversity, david medvigy, dylan craven, Europe, excess nitrogen, human activities, infectious bacteria, jefferson hall, journal nature, lars hedin, legume family, michiel van breugel, models, nitrogen, nitrogen fixation, nitrogen fixing trees, non legume trees, North America, photosynthesis, princeton university, rhizobia, root nodules, sarah batterman, stri, tropical forest, united states

A unique housing arrangement between a specific group of tree species and a carbo-loading bacteria may determine how well tropical forests can absorb carbon dioxide from the atmosphere, according to a Princeton University-based study. The findings suggest that the role of tropical forests in offsetting the atmospheric buildup of carbon from fossil fuels depends on tree diversity, particularly in forests recovering from exploitation.

Tropical forests thrive on natural nitrogen fertilizer pumped into the soil by trees in the legume family, a diverse group that includes beans and peas, the researchers report in the journal Nature. The researchers studied second-growth forests in Panama that had been used for agriculture five to 300 years ago. The presence of legume trees ensured rapid forest growth in the first 12 years of recovery and thus a substantial carbon “sink,” or carbon-storage capacity. Tracts of land that were pasture only 12 years before had already accumulated as much as 40 percent of the carbon found in fully mature forests. Legumes contributed more than half of the nitrogen needed to make that happen, the researchers reported. (more…)

Biodiversity: The most common issues

By Guest PostJanuary 5, 2013Environmentbiodiversity, biodiversity management, biological resources, coastal, common issues, ecological loss, ecosystem service, edward o wilson, evolutionary biologist, extinction, food, fuel, grassland, human interference, imperative factor, key issue, lincoln navigator suv, luxury cars, marine biodiversity, medicine, Nature, nutrient cycle, pacific northwest, poverty, rural area, shelter, soil formation, spotted owl, tropical forest

Biodiversity can be considered as an imperative factor that plays a crucial role in poverty reduction owing to its basic goods and the ecosystem services it provides. Over three billion people rely on coastal and marine biodiversity and about 1.7 billion people depend upon non-timber forest products and forests for biodiversity.

Common issues relating to biodiversity can be classified as:

Biodiversity as a source of income and food

World’s poor population, especially living in rural areas are dependent on biological resources for meeting most of their needs. At least, 90 percent of their needs relating to fuel, shelter, medicines and food come from biological resources. (more…)

Study Links Past Changes in Monsoon to Major Shifts in Indian Civilizations

By Guest PostMarch 15, 2012Environmentasia, band of heavy rain, bay of bengal, camilo ponton, civilizations, climate change, cmz, core monsoon zone, dorian fuller, drilling vessel, drought, equator, eth, global warming, godavari river, harappan civilization, humid monsoon, India, indian monsoon, indian peninsula, insolation, inter tropical convergence zone, itcz, joides resolution, liviu giosan, modern agriculture, monsoon, northern hemisphere, ocean, paleo climatic information, plankton fossil, sahara desert, sediment core, solar radiation, tim eglinton, tropical forest, vegetation, whoi, zurich

A fundamental shift in the Indian monsoon has occurred over the last few millennia, from a steady humid monsoon that favored lush vegetation to extended periods of drought, reports a new study led by researchers at the Woods Hole Oceanographic Institution (WHOI). The study has implications for our understanding of the monsoon’s response to climate change.

The Indian peninsula sustains over a billion people, yet it lies at the same latitude as the Sahara Desert. Without a monsoon, most of India would be dry and uninhabitable. The ability to predict the timing and amount of the next year’s monsoon is vital, yet even our knowledge of the monsoon’s past variability remains incomplete. (more…)

Shade-coffee farms support native bees that help maintain genetic diversity in remnant tropical forests

By Guest PostJuly 27, 20101 commentEnvironment, Natureafricanized honeybees, Berkeley, biodiverse tropical regions, biodiversity, biologist, buzz, canopy of trees, chiapas, christopher dick, ecology, evolutionary biology, m. affinis, Mexico, miconia affinis, migratory birds, native bees, native trees, pollination, role, saquiyac tree, shade-coffee farms, shade-grown coffee, shalene jha, tropical forest, university of california, university of michigan

ANN ARBOR, Mich. — Shade-grown coffee farms support native bees that help maintain the health of some of the world’s most biodiverse tropical regions, according to a study by a University of Michigan biologist and a colleague at the University of California, Berkeley.

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Tag Archives: tropical forest

Tropical forest carbon absorption may hinge on an odd couple

Biodiversity: The most common issues

Study Links Past Changes in Monsoon to Major Shifts in Indian Civilizations

Shade-coffee farms support native bees that help maintain genetic diversity in remnant tropical forests