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News articles on botany

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Mongabay.com news articles on botany in blog format. Updated regularly.

Present day tropical plant families survived in warmer, wetter tropics 58 million years ago

(10/18/2009) Fifty eight million years ago the tropical rainforests of South America shared many similarities with today's Neotropical forests, according to research published in the Proceedings of the National Academy of Sciences. Looking at over 2,000 fossils in Colombia from one of the world's largest open pit coal mines, scientists were able to recreate for the first time the structure of a long vanished rainforest. One inhabited by a titanic snake, giant turtles, and crocodile-like reptiles.


Plants recognize that family comes first

(10/16/2009) People like to say 'blood is thicker than water'. But plants may actually treat ther siblings better than many of us: although lacking in blood, scientists have found that plants not only recognize family, but respect their space.


Will tropical trees survive climate change?, an interview with Kenneth J. Feeley

(09/24/2009) One of the most pressing issues in the conservation today is how climate change will affect tropical ecosystems. The short answer is: we don't know. Because of this, more and more scientists are looking at the probable impacts of a warmer world on the Earth's most vibrant and biodiverse ecosystems. Kenneth J. Feeley, tropical ecologist and new professor at Florida International University and the Center for Tropical Plant Conservation at the Fairchild Tropical Botanic Garden, is conducting groundbreaking research in the tropical forests of Peru on the migration of tree species due to climate change.


Tropical East Asian forests under great threat

(06/02/2009) Tropical East Asia's rapid population growth and dramatic economic expansion over the past half century have taken a heavy toll on its natural resources. More than two-thirds of the region's original forest cover has been cleared or converted for agriculture and plantations, while its flora and fauna have suffered dearly from a burgeoning trade in wildlife products—several charismatic species have gone extinct as a direct consequence of human exploitation. Nevertheless tropical East Asia remains a top global priority for conservation, supporting up to a quarter of the world's terrestrial species.


Plant communities changing across the globe, says scientist Sasha Wright

(03/29/2009) Having studied plant communities across three continent and within widely varied ecosystems—lowland tropics, deciduous forests, grasslands, and enclosed ecosystems on hill-tops—graduate student Sasha Wright has gained a unique understanding of shifts in plant communities worldwide as they respond to pressures from land use and global climate change. “Plant communities are certainly changing,” Wright told Mongabay.com in a March 2009 interview. “These changes are undoubtedly affected by an increased occurrence of extreme weather events, temperature fluctuations, atmospheric CO2 concentrations, human land use, and in some cases urbanization of populations.”


Loss of genetic diversity hurts agriculture

(03/23/2009) Agriculture has long been dependent on the ability of plant species to adapt to varying environmental conditions — without this diversity agriculture development would not have been possible. But human activities are putting this diversity at risk through habitat destruction and introduction of alien species, especially in parts of the world where such diversity is particularly critical: tropical developing countries. This threat has spurred increased efforts to find and conserve plants with special traits adapted to the marginal farming systems of tropical smallholders.


Chocolate has been a delicacy north of Mexico for a thousand years

(02/02/2009) Chocolate, produced from cacao beans, has been a part of American culture for a thousand years according to new paper published in the Proceedings of the National Academy of Sciences. Analyzing chemical residue from jars of native peoples in New Mexico, researchers Patricia Crown and Jeffrey Hurst discovered theobromine, a chemical signature of cacao. The jars have been dated from 1000 to 1125 AD, well over three hundred years before Columbus and the earliest recorded discovery of cacao north of Mexico. The cacao jars are from Pueblo Bonito, an archaeological site in Chaco Canyon, which is located in northwestern New Mexico. Chaco Canyon, once home to 2,000-5,000 inhabitants, was composed of a dense group of pueblos, of which Bonito was the largest. Incorporating 800 rooms, Pueblo Bonito was the center of a number of towns and villages in Chaco Canyon.


Photos: Google Earth used to find new species

(12/22/2008) Scientists have used Google Earth to find a previously unknown trove of biological diversity in Mozambique, reports the Royal Botanic Gardens in Kew. Scouring satellite images via Google Earth for potential conservation sites at elevations of 1600 meters or more, Julian Bayliss a locally-based conservationist, in 2005 spotted a 7,000-hectare tract of forest on Mount Mabu. The scientifically unexplored forest had previously only been known to villagers. Subsequent expeditions in October and November this year turned up hundreds of species of plants and animals, including some that are new to science.


Tropical species face high extinction risk

(12/10/2008) Tropical plant species face an inherently high extinction risk due to small populations and restricted ranges relative to temperate species, reports research published in PLoS ONE. These traits leave them vulnerable to habitat disturbance and climate change.


What allows rainforests to grow so wildly?

(12/10/2008) Molybdenum, a rare trace element, is the secret to rainforests' lush growth, reports research published in the journal Nature Geoscience.


Invasive ant interferes with gecko's role in pollinating endangered plant

(11/28/2008) Invasive ants are destroying the symbiotic relationship between a colorful gecko and a critically endangered flower on the island of Mauritius, reports New Scientist citing research published by Dennis Hansen and Christine Müller in the journal Biotopica.


Rainforest biodiversity results from habitat specialization rather than chance

(10/22/2008) The rich diversity of trees in tropical forests may be "the result of subtle strategies that allow each species to occupy its own ecological niche" rather than random dispersal, report researchers writing in the journal Science.


Breakthrough may enable reforestation using mahogany

(10/16/2008) Brazilian researchers are closer to developing a way to establish large-scale mahogany plantations, reports the ITTO in its bi-monthly update. Scientists at the Federal Rural University of Amazonia (UFRA) have found that planting a matrix of mahogany with cedar reduces the incidence of the Hypsipyla grandella caterpillar, a chief pest of mahogany that has doomed previous attempts to reforest with the valuable hardwood species.


Regrowing the Amazon rainforest will require help from bats and birds

(09/15/2008) As large tracts of Amazon rainforest are degraded by industrial logging and cleared for cattle pasture and agriculture, other deforested areas are abandoned and being reclaimed by forest. Understanding this recolonization of degraded forest lands by pioneer species will critical to efforts to rehabilitate restore forests around the world.


Loss of wildlife is threatening biodiverse forests in northeastern India

(09/15/2008) Logging, agricultural expansion, and hunting of large birds and mammals in the tropical forests of northeastern India may be reducing the capacity of the biologically-rich ecosystem to regenerate itself, report researchers writing in the open-access journal Tropical Conservation Science.


New tree species discovered in Amazon biodiversity hotspot

(08/17/2008) I was walking down the Anaconda Trail at the Madre Selva Biological Station with botanist Rodolfo Vasquez when he suddenly stopped, stared at the bark of a 120-foot tree, and started searching the ground. Odd behavior? Perhaps, but when you're with Peru's top field botanist, odd behavior is forgivable, since it means that something interesting is probably afoot.


20% of the Brazilian Amazon's tree species to go extinct

(08/11/2008) A new study estimates the number of trees that will go extinct in the Brazilian Amazon due to habitat loss.


Account of 18th century Amazon adventurer to be published for the first time

(08/11/2008) After establishing his ingenious classification system in 1735, Carl Linnaeus, the greatest naturalist of his era, sent young and eager followers to all parts of the world to help him in the goal of collecting and cataloguing the world's species. It was a project unlike any before; Swedish naturalists, often referred to as Linnaeus's apostles, roamed as far as Japan, South America, Australia, and the Arctic with the same goal in mind—describing species according to Linnaeus's system.


Elephants may explain Mount Kilimanjaro's bamboo enigma

(06/25/2008) At nearly 6,000 meters in height, Mount Kilimanjaro is both Africa's tallest mountain and the world's highest solitary peak, home to a diverse range of habitats that support a large variety of plant species. Yet, unlike any other mountain in Africa, Mount Kilimanjaro contains no bamboo.


Global warming threatens California's native plants

(06/24/2008) Two-thirds of California's native plants could suffer an 80 percent or more reduction in geographic range by the end of the century due to changing climate warns a study appearing tomorrow in the open-access journal PLoS ONE.


Hunting, deforestation wipe out 6 of 7 hornbill species in Borneo park

(06/14/2008) Logging, forest conversion for palm oil, and hunting have triggered a precipitous drop in key wildlife populations in Malaysia's Lambir Hills National Park, on the island of Borneo, said a biologist speaking at a scientific conference in Paramaribo, Suriname.


New discoveries about past forest changes may help predict future ones in a changing climate

(06/12/2008) There is no better method to understand the future than to look to the past. Several new studies of the earth's glacial history are transforming the way scientists look at tree behvaior during extreme changes in climate. Scientists Remj Petit, Feng Sheng Hu, and Christopher Dick described such changes in relation to current global warming in the new issue of the journal Science. They report that already "in some parts of the world, tree species have started to shift their distributions in response to anthropogenic climatic warming", thus raising the stakes for understanding how tree species will adapt to coming changes.


Colombia creates rainforest reserve to protect medicinal plants

(06/11/2008) Colombia today announced the creation of a rainforest reserve dedicated to the protection of medicinal plants. The Orito Ingi-Ande Medicinal Flora Sanctuary encompasses 10,626 hectares of biologically-rich tropical rainforest ranging in altitude from 700 to 3300 meters above sea level. The sanctuary is based on an initiative launched by local indigenous communities with the support of the Amazon conservation Team (ACT), an innovative NGO working with native peoples to conserve biodiversity, health, and culture in South American rainforests. Members of the communities — which include the Kofán, Inga, Siona, Kamtsá, and Coreguaje tribes — combined their rich knowledge of medicinal plants with cutting-edge technology to determine the placement and extent of the reserve. Their contributions to the effort are reflected in the name of the reserve, according to ACT.


Defaunation, like deforestation, threatens global biodiversity

(05/20/2008) Loss of wildlife is a subtle but growing threat to tropical forests, says a leading plant ecologist from Stanford University. Speaking in an interview with mongabay.com, Dr. Rodolfo Dirzo says that the disappearance of wildlife due to overexploitation, fragmentation, and habitat degradation is causing ecological changes in some of the world's most biodiverse tropical forests. He ranks defaunation — as he terms the ongoing biological impoverishment of forests — as one of the world's most significant global changes, on par with environmental changes like global warming, deforestation, and shifts in the nitrogen cycle.


Insect diversity in the tropics greater than previously believed

(05/15/2008) The tropics are more biodiverse than previously believed, report researchers writing in the journal Science.


'CAT scan' shows Hawaiian forests invaded by alien species

(03/03/2008) Invasive plant species are altering the ecology of Hawaiian rain forests, reports a study published in the Proceedings of the National Academy of Sciences (PNAS).


Giant exploding palm tree discovered in Madagascar

(01/17/2008) A gigantic palm that flowers itself to death and exists as part of an entirely unique genus has been discovered in Madagascar; its name will be published in the Botanical Journal of the Linnean Society on 17 January 2008. The mystery palm has a huge trunk which towers over 18m high and fan leaves which are 5m in diameter - among the largest known in flowering plants. This is the most massive palm ever to be found in Madagascar.


Prehistoric Carnivorous Fungi Lassoed its Prey

(12/13/2007) Scientists have discovered the oldest known carnivorous fungus, according to a study published in Science.


Transgenic plant may thrive under global warming-induced drought

(11/26/2007) Researchers have created a drought-resistant tobacco plant through genetic engineering, according to a study published in the journal Proceedings of the National Academy of Science. The work could eventually lead to the development of crops that are better able to survive higher temperatures and reduced rainfall associated with global warming.


Large-scale agriculture 'compromises' forest's ability to recover

(11/19/2007) As deforestation of tropical forests continues unhindered, one of the future hopes for these damaged ecosystems is regeneration in secondary forests. Some areas that were once slash-and-burned for cattle ranching or subsistence agriculture have been abandoned, allowing scientists to study the possibility of recovery in the rainforest. If anyone has a clear idea of the potential of secondary forests it is Robin L. Chazdon. Dr. Chazdon, a full professor of Ecology and Evolutionary Biology at the University of Connecticut, has been studying the regeneration of secondary forest for over twenty-five years. She has published over 50 papers on tropical ecology, currently she serves as an active member of the Biotropica editorial board and is a member of the Bosques Project, which measures secondary forest recovery in Northern Costa Rica.


Biodiversity conservation will only work if local people benefit

(11/19/2007) Biodiversity loss is already having an economic impact in Africa according to a 7-year monitoring project underwritten by Europeans and African governments. The project, known as the Biodiversity Monitoring Transect Analysis in Africa (BIOTA), relies on a network of biodiversity observatories equipped with weather stations, sensors and a monitoring program that includes remote sensing, data on soil fertility and agricultural indicators. Dr. Nina Farwig, a scientist at the Johannes Gutenberg-University of Mainz and a participating member of BIOTA-East Africa, says that conservation efforts in the tropics will only be effective if the local people benefit. Her work with BIOTA shows that even in the absence of extensive forest cover, a patchwork of agricultural landscapes can contribute to the biodiversity conservation.


Law enforcement key to saving Borneo's rainforests

(11/13/2007) In an interview with mongabay.com, Dr. Rhett Harrison, a Smithsonian Tropical Research Institute (STRI) associate researcher and Secretary for the Asia-Pacific Chapter of ATBC, says that law enforcement could be the key to safeguarding biodiversity contained in Borneo's lowland parks. Harrison says there may be opportunities for conservationists to work with oil palm to developers to ensure that existing forests are not converted for plantations and that palm oil can be produced in a sustainable manner. He also adds that carbon offsets may eventually offer a means to fund conservation and sustainable development efforts in areas that still have standing forest.


Amazon plant diversity still a mystery

(10/21/2007) The Amazon is one of the few places on the earth that still evokes an accurate sense of mystery. While the Taiga, Antarctica, and Sahara may compare to the Amazon in wilderness size, none hold the same mystique of unknown species. It is believed that one third of the world's species inhabits this tropical rainforest. The only region comparable in mystery (though not in species) may be the world's oceans.


"Weird" algae key to survival of coral reefs

(08/31/2007) A team of coral researchers has taken a major stride towards revealing the workings of the mysterious "engine" that drives Australia's Great Barrier Reef, and corals the world over.


Orchids may have co-existed with dinosaurs

(08/29/2007) Orchids are old enough to have co-existed with dinosaurs, report Harvard University scientists.


U.S. grazing lands at risk due to rising CO2 levels

(08/27/2007) Rising carbon dioxide levels could cause significant changes to open grazing lands and rangelands around the world, reports a study published in the journal Proceedings of the National Academy of Sciences (PNAS).


Climate change is making poison ivy worse

(06/26/2007) New research shows that climate change is making poison ivy more potent, according to an article in The Wall Street Journal.


Rainforest trees colonized Africa from the Amazon

(06/24/2007) A giant rainforest tree is helping scientists understand similarities between African and South American rainforests, reports research published in the journal Molecular Ecology.


Carnivorous plants invade San Francisco

(05/13/2007) While most plants derive nutrients from soil, some trap and consume living creatures for their primary source of sustenance. Now a special exhibit at the San Francisco Conservatory of Flowers offers a journey into the strange world of carnivorous plants.


Tropical plants may be more adaptable to climate change

(05/07/2007) Tropical plants may be more adaptable to environmental change by extracting nitrogen from a variety of sources, reports a study published in the May 7 early online edition of The Proceedings of the National Academy of Sciences.


Climate change could dramatically change forests in Central America

(05/02/2007) Drought could cause dramatic shifts in rainforest plant communities in Central America, reports a new study published in the May 3 issue of Nature. The research shows that many rainforest plants are ill-equipped to deal with extended dry periods, putting them at elevated risk from changes in climate projected for the region.


Neon green gecko key to preventing Mauritian plant extinction

(04/17/2007) A vibrantly colored gecko plays a key role in a highly threatened ecological community in Mauritius reports new research published in American Naturalist. Studying plant-animal interactions in Mauritius, an Indian Ocean island famous for its extinct dodo bird, researchers found that a rare plant, Trochetia blackburniana, benefits from its proximity to Pandanus plants because they house high densities of geckos responsible for pollination. The findings, which unusually identify a lizard as a key pollinator, are significant because they provide "valuable management insights for ongoing conservation efforts to save the highly endangered flora of Mauritius.


Maize cultivated at least 7,300 years ago in Mexico

(04/09/2007) Anthropologists have found the earliest known evidence of maize cultivation in Mexico. The discovery, published in the April 9-13 edition of the journal Proceedings of the National Academy of Science, pushes back farming of the ancestor of modern corn to about 7,300 years ago.


Amazon, Madagascar, Borneo are top plant biodiversity hotspots

(03/20/2007) A new map devised by biologists at the University of California, San Diego (UCSD) and the University of Bonn in Germany, shows that the Andes-Amazon region of South America, Madagascar, Borneo, and New Guinea reign as the world's hotspots for plant diversity. The researchers say the map will help both prioritize areas for biodiversity conservation and forecast the impact of climate change on plant communities and the ecological services they provide.


New bamboo species discovered in U.S., first in 200 years

(03/13/2007) Botanists have discovered a previously unknown species of North American bamboo in the hills of Appalachia. It is the third known species of bamboo in the United States, but the first new species in more than 200 years. The species is named Arundinaria appalachiana.


Biodiversity extinction crisis looms says renowned biologist

(03/12/2007) While there is considerable debate over the scale at which biodiversity extinction is occurring, there is little doubt we are presently in an age where species loss is well above the established biological norm. Extinction has certainly occurred in the past, and in fact, it is the fate of all species, but today the rate appears to be at least 100 times the background rate of one species per million per year and may be headed towards a magnitude thousands of times greater. Few people know more about extinction than Dr. Peter Raven, director of the Missouri Botanical Garden. He is the author of hundreds of scientific papers and books, and has an encyclopedic list of achievements and accolades from a lifetime of biological research. These make him one of the world's preeminent biodiversity experts. He is also extremely worried about the present biodiversity crisis, one that has been termed the sixth great extinction.


Indigenous populations deforested New World rainforests before European contact

(02/28/2007) Indigenous populations used fire to clear large areas of tropical forest well before the arrival of Europeans reports a new study published in Annals of the Missouri Botanical Garden. The research has important implications for understanding the impact of present forest development on biodiversity and forest regeneration in the tropics.


Rainforest tree diversity may be tied to seed dispersal

(11/29/2006) A new study says tree distribution in the rainforest is highly dependent on species' method of seed dispersal. The research could help explain how a large number of rainforest trees can coexist in a small area.


Mother nature encourages diversity in rainforest trees

(01/26/2006) Older forests have a greater diversity of trees than younger forests according to research published in Friday's issue of the journal Science. The study -- conducted by 33 ecologists from 12 countries -- found that nature encourages diversity by selecting for less common trees as the trees mature, indicating that diversity has ecological importance to tropical forests.


Plants face extinction threat due to lack of sex

(01/16/2006) The decline of birds, bees and other pollinators may be putting plants at risk of extinction according to a new study.

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