Natural History

Portrait of an island

Format: Hardcover Language: English Format: PDF / Kindle / ePub Size: 9.24 MB Downloadable formats: PDF It was only after hundreds of streams were so cleared that officials realized that salmon actually *need* such large woody debris during their migration. And who is most likely to see genes being important or very important? Since, according to Darwin's theory, organisms adapt to their environment, they must also adapt to other organisms in that environment. Roche Moutonnee: a resistant, sheep-shaped mound of bedrock left by glacial erosion. [...]

Occasional papers of the Museum of Natural History, the

Format: Paperback Language: English Format: PDF / Kindle / ePub Size: 7.83 MB Downloadable formats: PDF Lucia Forestry Department for early morning or late afternoon trips. Relatively low annual rainfall of about 25 to 40 inches, together with sandy, low-fertility soil, accounts for the reduced diversity of trees in the cross timbers compared to elsewhere in the oak-hickory forest (Risser and Rice 1971). Temperature is largely dependent on the incidence of solar radiation. Indeed, we risk the possibility of totally misunderstanding the very meaning of terms like “hierarchy” as highly organized systems of command and obedience — these, as distinguished from personal, individual, and often short-lived differences in status that may, in all too many cases, involve no acts of compulsion. [...]

The Natural History of the Fishes of Guiana, Part II

Format: Hardcover Language: English Format: PDF / Kindle / ePub Size: 6.40 MB Downloadable formats: PDF Of these one hundred of the best were put together to create the ten volumes of Art Forms of Nature. Under conditions of closure, environmental effects, and particularly cultural innovations, would be expected to enter a system through the key function, for the obvious reason that it has the most direct connection with environment. The other day I saw a TV program about the burning of the Amazon rainforest, and I felt terrible. Before talking about the mesic forest of the piedmont, I want to mention the more typical forest type of the piedmont, so that you'll understand why the mesic forest is different. [...]

A Sand County Almanac: With Other Essays on Conservation

Format: Print Length Language: English Format: PDF / Kindle / ePub Size: 14.25 MB Downloadable formats: PDF That these ideologies may foster an anti-ecological outlook in people of all strata hardly requires emphasis. Does the toxin offer selective advantage to the two strains in their estuarine niche or in the human host? Thus, they were at odds with the mechanistic philosophy of the day (i.e. view of nature and organisms with a “machine” metaphor). In June of 1933, Heidegger gave a speech at the Freiburg university stadium when a symbolic bonfire of un-German like books were burned. [...]

Man: Where, Whence, and Whither: Being a Glance at Man in

Format: Paperback Language: English Format: PDF / Kindle / ePub Size: 8.57 MB Downloadable formats: PDF In 1974, the Evanston Ecology Center was built and donated to the city of Evanston by a group of citizens who believed the city would benefit greatly from a facility dedicated to environmental education and awareness. After 100 years in the Laflin Building, the Academy opened the doors to its new, larger home in Lincoln Park, the Peggy Notebaert Nature Museum, in October 1999. Houghton Mifflin Company, Boston, MA. 420 pp. [...]

Catalog of the Type Specimens of Seastars (Smithsonian)

Format: Paperback Language: Format: PDF / Kindle / ePub Size: 5.89 MB Downloadable formats: PDF We supply a range of professional bat detectors from the world's top specialists, Pettersson, Elekon and Batbox, as well as more affordable ones for enthusiasts from Magenta. Exploitation of an environment by means of certain cultural devices may also drastically affect the environment, which again reacts upon the culture. The key to the contrast may perhaps be found in a difference in the tonality of piety and thought which students of comparative theology find between the Greek and the Latin Churches. [...]

Theodore Wores, 1859-1939 : a retrospective exhibition :

Format: Paperback Language: Format: PDF / Kindle / ePub Size: 5.85 MB Downloadable formats: PDF © 2004 Separated from the mainland of Africa for 160 million years, Madagascar has evolved an incredible wealth of biodiversity, with thousands of species that can be found nowhere else on earth. Q: Isn’t over-population just a human distribution problem? Because of favorable precipitation, canopy cover increased from about 140% to almost 200% in just 7 years in north central Oklahoma (J. If a country’s population did explode this way, Malthus warned that there was no hope that the world’s food supply could keep up. [...]

The Bird in Natural History: Before, During, & After Audubon

Format: Paperback Language: Format: PDF / Kindle / ePub Size: 13.07 MB Downloadable formats: PDF Hummingbird eggs would make a tasty snack for a squirrel or chipmunk, and a tree-climbing Black Ratsnake might take an incubating or brooding female, her eggs, or chicks. The existence of a balance of nature has been a dominant part of Western philosophy since before Aristotle. What, if any, species of animals, birds, fish, shore life, or plants have died out in the process? But while the power inherent in a system is unevenly distributed, it is not confined to the key function unit. [...]

Mysteries of Bee-keeping Explained

Format: Print Length Language: English Format: PDF / Kindle / ePub Size: 10.35 MB Downloadable formats: PDF But then, on closer inspection of the bark chunk, I noticed the abdomens of several ants sticking out of a crack in the bark. Polycyclic Aromatic Hydrocarbons (PAHs): over a hundred organic carcinogens produced by the incomplete burning of oil, coal, gas, tobacco, garbage, and even meat. However, if it’s true that species alive today represent only 0.1% of Earth’s entire biological history, their extinctions are all the more tragic. In December of 2012 I found an area in the woods where deer had scraped twenty or more little areas clear of leaves looking for acorns. [...]

Scripture Natural History

Format: Paperback Language: English Format: PDF / Kindle / ePub Size: 8.40 MB Downloadable formats: PDF Examples of this are: the Sheepshead Fire (Oregon), the Lakeview Complex (Oregon), the Sheep Complex (Nevada) and the Elk Mountain Complex (South Dakota and Wyoming). It avoids, as much as possible, jargon and mathematical formulas, and modeling is absent as well."--Gerhard C. Depleted biodiversity leads to population crashes, declines in genetic variability, and extinctions. Honeybees cannot fly at low temperatures (like the orchard mason bee) to efficiently pollinate early-spring blooms like blueberries, the first apple bloom and almonds. [...]