An ecosystem is a biological community of interacting organisms and their physical environment. Ecosystems can be changed by both human activity and natural succession. Ecological succession is the observed process of change in the species structure of an ecological community over time. The time scale can be decades (for example, after a wildfire), or even millions of years after a mass extinction. This essay aims to identify ways in which vegetation has transformed over time, and to evaluate the importance of both human and physical factors.…
Cited: Fowler, Cary. "Artificial Crop Selection Is Destroying Biodiversity." Latest News, Comment and Reviews from the Guardian | Guardian.co.uk. Sept.-Oct. 2009. Web. 06 Jan. 2011. http://www.guardian.co.uk/commentisfree/2009/feb/16/charles-darwin-scienceofclimatechange…
Environmental issues include the effects of extensification and intensification of agriculture on the soil, water, and biodiversity of the local and downstream environment (Khan & Shah 2011).…
• Write your name & date at the top of your paper. Turn it in at the end of lecture.…
And there is more numerous and varied than insects and that is microbial species that can be found in plants and animals and are especially in the soil. Microbial is important in helping and protecting the animals and plants against pest, as well as serves to decomposed residues including pathogens and toxic agents and transform them into nutrients for the continual re-generation of life. In any ways either visible or invisible biodiversity is important in agriculture. Hence of decreasing of that diversity endangers agriculture just as it endangers all the process of life in this world, which is inherently independent. Not only in agriculture is biodiversity is important. Biological diversity is also important when it comes to marine and fresh food resources, because biological diversity provides raw material for the marine food chain and seafood production. It also influences the capacity and the availability of marine ecosystem to perform other environmental services. They harvested marine seafood species with exceeding number of 100 million tons per year and provide about 6% of all protein and 17% of animal protein consumed by…
dripping into the water. The mercury then got into the fish and into the humans…
Ecosystems purify our air and water, help to control our climate and provide goods and services that are often impossible to replace. However, many ecosystems are under threat. As the world’s population continues to grow, consumption of food, water, and other materials increases and the ecosystems that provide for these needs are being over-burdened and in some cases destroyed.…
Earth is composed of many different ecosystems and each one is a "dynamic complex of plant, animal, and micro-organism communities interacting with the non-living environment as a functional unit" (Protecting Threatened Ecosystems, 2004). These ecosystems are an intricate part of the human lifecycle as they provide us with our water, food and energy. Since mankind is in a take and take some more relationship with the ecosystems, many of them have had their natural processes disrupted, not to mention the added pollution and excessive use. According to the Swiss Agency for Development and Cooperation "Over 60% of all ecosystems on the globe are overexploited and have entered into a degradation cycle with often unknown consequences" (2004). How do we as humans combat this you ask? The answer, a simple one, is through ecosystem maintenance by conservation or preservation.…
Janetos, Anthony C. (1997). Do We Still Need Nature? The Importance of Biological Diversity. Consequence Vol. 3, No. 1. Retrieved Sunday, September 23, 2007 from http://www.gcrio.org/CONSEQUENCES/vol3no1/biodiversity.html.…
* Biodiversity: This has been feared a lot lately, because when adapting more land to produce the crops needed for biofuels, the consequence would be that more habitats would be lost for…
Holl, K.D., Crone, E.E. & Schultz, C.B. (2003). Landscape restoration: Moving from generalities to methodologies. Bioscience, 53, 491–502.…
AWARE of the general lack of information and knowledge regarding biological diversity and of the urgent need to develop scientific, technical and institutional capacities to provide the basic understanding upon which to plan and implement appropriate measures,…
The abundance of a species and species diversity affect how natural resources are processed within an ecosystem. This pattern of processing contributes to functional and compositional characteristics of an ecosystem. But many ecosystems around the world are currently experiencing significant changes in species composition, abundance, and diversity due to the influence of human activity. These changes have, more often than not, led to a reduction in species diversity. Changes in species composition, species richness, and/or functional type affect the efficiency with which resources are processed within an ecosystem, raising the issue of whether the biogeochemical functioning of an ecosystem will be impaired by a loss of species or the introduction of a new species.…
The loss of biodiversity has negative effects on livelihoods, clean water supply, food security and resilience to environmental disasters. It has consequences for 75% of the world’s poor—some 870 million people—who live in rural areas and rely on ecosystems and the goods they produce to make a living. Water provision is one of the most vital ecosystem services that biodiversity can help ensure, yet about 2.7 billion people experience severe water scarcity for at least one month per year. The loss of coral reefs has significant negative consequences for 350 million people living in coastal areas by reducing coastal protection and habitat for fish. Deforestation and land conversion contribute about 30% of global greenhouse emissions, and the loss of diversity reduces the resilience of ecosystems to disturbances. Environmental degradation and disasters—manifested by floods, erosion and sedimentation—threaten large-scale infrastructure investments in hydropower, irrigation or coastal defenses.…
The conversion of natural ecosystems to pasture land doesn’t damage the land initially as much as crop production, but this change in usage can lead to high rates of erosion and loss of topsoil and nutrients. Overgrazing can reduce ground cover, enabling erosion and compaction of the land by wind and rain.. This reduces the ability for plants to grow and water to penetrate, which harms soil microbes and results in serious erosion of the land.…