Dendrology

Dendrology

Too often, we think and talk about prairie restoration aka prairie reconstruction in the wrong way. Instead of trying to restore an ecosystem, we try to reproduce history. I was in Washington D. After the death of the president, the building went through drastic changes, including being completely gutted after a partial collapse of the interior. By the time the decision was made to restore the building for use as a historic site, the National Park Service basically had to start from scratch. In the case of prairie restoration, someone identifies a tract of land that used to be prairie but has been converted into something completely different usually cropland , and tries their best to restore what was there before it was converted.

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The popular and the scientific meaning. Here the term ecology is probably quite poorly defined. To my gut feeling, the concept relates to the concept of global change.

For decades, dating back to the s, Helen Black was a conservationist, dedicated to protecting green space in Cincinnati, Indian Hill, Adams County and in Maine, where she often vacationed.

Please click here to contact Ben Davidson by e-mail. Sc Hons in Oceanography. Please click here to contact Robyn Granger by e-mail ; web https: Participated in many projects and international conferences. Member of 3 international oragnizations of Earth Sciences. Looking for a PhD position in Coastal sediment dynamics, sediment transport or environmental geology. Please click here to contact Salma Tifratine by e-mail ; Linkedin https: Current works and research focus on applications of remote sensing and GIS technologies in agro-ecosystems monitoring and food security, vegetation mapping and monitoring.

Other fields of interest include mitigation and adaptation of agriculture and environmental resources to climate change, and other climate change related projects. Personal values include discipline, inter-personal skills, ability to work under pressure, enthusiasm in working in multi-cultural and interdisciplinary environments. Please click here to contact Maurice Mugabowindekwe by e-mail. Three years experience in data collection and analysis of benthic fauna, with publication.

Two years experience marine conservation programs, land and coral reef ecology, community liaison, and fundraising. Proficient with lab and field equipment, and statistical analysis.

Volcanic Activity and Human Ecology

Perhaps the Brooks River’s most dominant bear, Bear With a glut of fresh salmon at their disposal, many brown bears just munch the fatty skin and brains of the fish, leaving the bright red meat for lesser bears. By later July, once the salmon run peters out, however, most of the bears usually vanish into the dense woods from whence they came, seeking fresher feeding grounds.

The reason for this prolonged fishing season is simple:

Ecologist Ted Schuur from the University of Florida describes how his research team used radiocarbon dating, a technique typically used to determine the age of artifacts, to measure the movement of ‘old’ organic carbon within Alaskan permafrost.

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Ecosystems, for example, contain abiotic resources and interacting life forms i. Ecosystems are dynamic, they do not always follow a linear successional path, but they are always changing, sometimes rapidly and sometimes so slowly that it can take thousands of years for ecological processes to bring about certain successional stages of a forest. An ecosystem’s area can vary greatly, from tiny to vast. A single tree is of little consequence to the classification of a forest ecosystem, but critically relevant to organisms living in and on it.

Each of those aphids, in turn, support diverse bacterial communities.

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A Tim Sparks slides a small leather-bound notebook out of an envelope. The book’s yellowing pages contain bee-keeping notes made between and by the late Walter Coates of Kilworth, Leicestershire. He adds it to his growing pile of local journals, birdwatchers’ lists and gardening diaries. Successive Marshams continued compiling these notes for years. A small band of researchers is combing through hundreds of years of records taken by thousands of amateur naturalists.

And more systematic projects have also started up, producing an overwhelming response. He now spends much of his time following leads from one historical data set to another. As news of his quest spreads, people tip him off to other historical records, and more amateur phenologists come out of their closets. The competition has taken place annually on the Tenana River in Alaska since , and analysis of the results showed that the thaw now arrives five days earlier than it did when the contest began.

The data can also hint at how nature will change in the future. Together with models of climate change, amateurs’ records could help guide conservation. Her analysis shows that the increased droughts that the models predict could halve the breeding populations at the ponds. F But not all professionals are happy to use amateur data. Because different observers can have different ideas of what constitutes, for example, an open snowdrop.

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Maude is working with an ecologist on cleaning the Hudson River. Walter is jealous since the guy is young and attractive. Maude has sexual fantasies about the ecologist.

Monday, 12 December Radiometric Dating versus Relative Dating In palaeontology and archaeology, it becomes necessary to determine the age of an artifact or fossil when it is uncovered. This, of course, is so that it can be properly catalogued, and, if valid, can be related to or associated with other objects from the same era.

However, such a task can be quite tricky. Fossils and artifacts don’t come with labels attached that clearly state their age. Therefore, scientists need to make use of proper techniques to adequately specify what the age of a fossil or artifact is. Two of the most well-known and most frequently used include radioactive dating and relative dating. Radiometric Dating Phrased simply, radioactive dating is the method that uses measurements relating to the radioactivity of the atoms in a fossil or an artifact.

How is this done? Organic bodies, such as you and me, as well as inanimate objects, such as stone tablets or rocks. What “decay” means is that the atoms in the object or body become unstable, and, over time, begin to “decompose” by giving off radiation in the forms of subatomic particles such as electrons and protons.

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About the book Description Volcanic Activity and Human Ecology deals with dating, chronology, stratigraphy, volcanic activity, and with the impacts of volcanism on animals, plants, human populations, and the environment. Some of the chapters explain how such findings must be weighed against other causes that influence human behavior and survival, such as factors of social customs, climatic change, shifting biogeographic patterns, disease, and the ability to adapt.

Each of the chapters that assess the possible human response to volcanism does so by searching for multiple explanations of the archaeological record, avoiding the simple argument that people were dramatically and inevitably overcome by catastrophic geologic events. The book begins with discussions of volcanism as seen by geologists and pedologists. These include s a general overview of volcanoes and volcanism; a review of the production, dispersal, and properties of tephra and of the geologic methods used to study tephra; and the nature of volcanic soils and their economic impact.

Subsequent chapters use the geologic and modern records to examine volcanoes as hazards to people. The final series of papers deals with the interrelationships between volcanism and human occupations as seen through the archaeological, paleobotanical, and paleozoological records. Show more Volcanic Activity and Human Ecology deals with dating, chronology, stratigraphy, volcanic activity, and with the impacts of volcanism on animals, plants, human populations, and the environment.

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Integrative level Ecosystems regenerate after a disturbance such as fire, forming mosaics of different age groups structured across a landscape. Pictured are different seral stages in forested ecosystems starting from pioneers colonizing a disturbed site and maturing in successional stages leading to old-growth forests. The scope of ecology covers a wide array of interacting levels of organization spanning micro-level e. Ecosystems, for example, contain populations of individuals that aggregate into distinct ecological communities.

It can take thousands of years for ecological processes to mature through and until the final successional stages of a forest.

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Ecological impact of the dingo after its arrival in Mainland Australia The thylacine is likely to have become near-extinct in mainland Australia about 2, years ago, and possibly earlier in New Guinea. Doubts exist over the impact of the dingo since the two species would not have been in direct competition with one another as the dingo hunts primarily during the day , whereas it is thought that the thylacine hunted mostly at night. In addition, the thylacine had a more powerful build, which would have given it an advantage in one-on-one encounters.

The thylacine was also much less versatile in diet than the omnivorous dingo. The adoption of the dingo as a hunting companion by the indigenous peoples would have put the thylacine under increased pressure. The results show that the humans were obviously one of the major factors in the extinction of many species in Australia.

The results indicated that the last of the thylacines in Australia, on top of the threats from dingoes, had limited genetic diversity, due to their complete geographic isolation from mainland Australia. The paper documented the obviously competitive relationship between the dingo, the thylacine and the Tasmanian devil, and noted that the dingo may have actually fed on the native hen. Yet, the paper concludes, people ignore the emergence of humans on the continent among all of this.

In the end, the competitiveness of the dingo and thylacine populations led to the extinctions of the thylacine, but the arrival of the humans only further exacerbated this. But the marsupi-carnivore disease, with its dramatic effect on individual thylacine longevity and juvenile mortality, came far too soon, and spread far too quickly. In fact the image is cropped to hide the fenced run and housing, and analysis by one researcher has concluded that this thylacine is a mounted specimen, posed for the camera.

At the time of the first European settlement, the heaviest distributions were in the northeast, northwest and north-midland regions of the state.

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By Vijayalaxmi Kinhal Ecologist Although many people have heard that Styrofoam is detrimental to the planet, few understand how Styrofoam harms the environment. Find out the impact Styrofoam has on the planet to help you minimize the damage caused by this material. Styrofoam Is Expanded Polystyrene Styrofoam has become such an accepted everyday product that people rarely stop to realize that it is made from polystyrene, a petroleum-based plastic.

It explains that polystyrene beads are processed using chemicals that are steamed and expand, creating the substance EPS. It offers good insulation properties that keep products cold or hot, and keeps things safe during the shipping process without adding weight.

Watch video · Bird-Watching While Black: A Wildlife Ecologist Shares His Tips He’s a professor of wildlife ecology in the College of Agriculture, Forestry and Life Sciences at Clemson University in South Carolina, as well as a published poet, naturalist, hunter, and birder.

The study of the relationships between living organisms and their physical environment. Ecologists study these relationships among organisms and habitats of many different sizes, ranging from the study of microscopic bacteria growing in a fish tank, to the complex interactions between the thousands of plant, animal, and other communities found in a desert. Ecosystems depend on the energy that moves in and out of that system. You could have an entire ecosystem underneath a big rock. There is an overall ecosystem of the entire planet the biosphere.

An ecosystem can be as small as a puddle or as large as the Pacific Ocean. Energy flows through ecosystems in one direction From the Sun, through photosynthetic organisms including green plants and algae , to herbivores, to carnivores and then to decomposers.

Malaysian ecologist in crocodile attack ‘sacrificed his leg to survive’

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But is it culture, genetics or the environment that drives such a choice—and is there an optimal age difference? New research shows that, at least for the Sami people of preindustrial Finland, men should marry a woman almost 15 years their junior to maximize their chances of having the most offspring that survive. Yet, only 10 percent of these marriages were between men and women with that optimal age difference.

The span ranged from men marrying women as much as 20 years older to women marrying men as much as 25 years older; the average age difference between husband and wife was three years. Marriage customs or the availability of reindeer to support a new family the Sami people are reindeer herders might be the reason that more Sami marriages did not display the optimum age difference, Helle says.

Ultimately, it is the age at which the woman begins bearing children that is the biggest factor in survival, the paper in Biology Letters suggests: Younger women, in general, bear more healthy children.

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