Lichen is a composite organism. Mosses lack the stems and leaves. Both lichens and mosses grow on trees and rocks. Select the correct answer using the code below:
Overexploitation of groundwater from an aquifer can result in a peak water curve. Overexploitation occurs if a water resource, such as the Ogallala Aquiferis mined or extracted at a rate that exceeds the recharge rate, that is, at a rate that exceeds the practical sustained yield.
Recharge usually comes from area streams, rivers and lakes. An aquifer which has been overexploited is said to be overdrafted or depleted. Forests enhance the recharge of aquifers in some locales, although generally forests are a major source of aquifer depletion.
This has led to the concept of peak water. Overlogging Clear cutting of old growth forests in Canada. Forests are overexploited when they are logged at a rate faster than reforestation takes place. Reforestation competes with other land uses such as food production, livestock grazing, and living space for further economic growth.
Historically utilization of forest products, including timber and fuel wood, have played a key role in human societies, comparable to the roles of water and cultivable land.
Today, developed countries continue to utilize timber for building houses, and wood pulp for paper. In developing countries almost three billion people rely on wood for heating and cooking.
West AfricaMadagascarSoutheast Asia and many other regions have experienced lower revenue because of overexploitation and the consequent declining timber harvests.
Many coral reefs are overexploited; threats include coral mining, cyanide and blast fishingand overfishing in general. Overexploitation is one of the main threats to global biodiversity.
Marine ecosystems are of particular interest in this regard. Overgrazing can be caused by native fauna, as shown in the upper right.
However, past human overexploitation leading to elimination of some predators may be behind the situation. Overexploitation threatens one-third of endangered vertebratesas well as other groups.
Industries responsible for this include the trade in bushmeatthe trade in Chinese medicineand the fur trade. It currently protects, to a varying degree, some 33, species of animals and plants. It is estimated that a quarter of the endangered vertebrates in the United States of America and half of the endangered mammals is attributed to overexploitation.
Overexploitation of these resources for protracted periods can deplete natural stocks to the point where they are unable to recover within a short time frame. Humans have always harvested food and other resources they have needed to survive.
Human populations, historically, were small, and methods of collection limited to small quantities. With an exponential increase in human population, expanding markets and increasing demand, combined with improved access and techniques for capture, are causing the exploitation of many species beyond sustainable levels.
The Carolina parakeet was hunted to extinction. Today, overexploitation and misuse of natural resources is an ever-present threat for species richness. This is more prevalent when looking at island ecology and the species that inhabit them, as islands can be viewed as the world in miniature.
Island endemic populations are more prone to extinction from overexploitation, as they often exist at low densities with reduced reproductive rates.
Achatinelline snails have 15 species listed as extinct and 24 critically endangered  while 60 species of partulidae are considered extinct with 14 listed as critically endangered.
With civil unrest, for example in the Congo and Rwandafirearms have become common and the breakdown of food distribution networks in such countries leaves the resources of the natural environment vulnerable.
Great Auk — the penguin-like bird of the north, was hunted for its feathers, meat, fat and oil. Carolina parakeet — The only parrot species native to the eastern United States, was hunted for crop protection and its feathers. Other species affected by overexploitation include: The international trade in fur: New Zealand mistletoe Trilepidia adamsiiorchids, cacti and many other plant species Shell collectors: Marine molluscs Chinese medicine:Part III: Why Bottled Water is Bad for Water.
Welcome to Part III of Bottled Water: Why It’s Bad for You, the Environment, and Water. In Part III I’ll be looking at the impacts that bottled water has on water itself (and therefore on the communities and environment near this water).
Role of Non-Governmental Organizations (NGO) in Environment Protection! Today we come across various non-governmental organizations whose concerns are focused on various areas such as social issues, health issues, and environmental issues. Non-Governmental Organization is a broad term, which.
Water, an international, peer-reviewed Open Access journal. Founded in , University of California Press, Journals and Digital Publishing Division, disseminates scholarship of enduring value.
One of the largest, most distinguished, and innovative of the university presses today, its collection of print and online journals spans topics in the humanities and social sciences, with concentrations in sociology, musicology, history, religion, cultural and. JSTOR is a digital library of academic journals, books, and primary sources.
Overexploitation, also called overharvesting, refers to harvesting a renewable resource to the point of diminishing srmvision.comued overexploitation can lead to the destruction of the resource. The term applies to natural resources such as: wild medicinal plants, grazing pastures, game animals, fish stocks, forests, and water aquifers..
In ecology, overexploitation describes one of the five.