نتایج جستجو برای: overexploitation
تعداد نتایج: 943 فیلتر نتایج به سال:
Although groundwater resources have long been selected as a safe choice for resolving human water requirements, overexploitation of them, especially at Ardabil plain, has promoted a decrease in the quality and quantity of these resources. One of the significant solutions is to identification of the groundwater potential zones and exploitation of them according to their potentials. The aim of th...
Overexploitation of natural resources is often viewed as a problem characteristic only the human species. However, any species could evolve capacity to overexploit its essential through selection and competition, even point resource collapse. Here, we describe processes that potentially lead overexploitation synthesize what known about limiters in other We propose there are five pathways counte...
In many parts of the world, particularly remote and underdeveloped regions, reports fisheries catch, effort, landing data are limited. order to implement effective fishing regulations protect natural stocks, understanding pressure, key target species, catch composition, value each species is vital. regions where published limited, sampling numerous small boats sites not feasible, fish market su...
Most of the international trade in fins (and likely meat too) is derived from requiem sharks (family Carcharhinidae), yet only two 56 species currently regulated. Here, we quantify catch, trade, and shortfall national regional fisheries management (M-Risk) for all shark based on 831 assessments across 30 countries four Regional Fisheries Management Organizations (RFMOs). Requiem comprise over h...
The notion of fitness is central in evolutionary biology. We use a simple spatially extended predator-prey or host-pathogen model to show a generic case where the average number of offspring of an individual as a measure of fitness fails to characterize the evolutionary dynamics. Mutants with high initial reproduction ratios have lineages that eventually go extinct due to local overexploitation...
The Caatinga biome is one of the largest areas South American seasonally dry tropical forest that has been severely affected by unsustainable natural resource use. Furthermore, identified as an ecologically sensitive region particularly susceptible to climate changes. One most economically important native palm tree for traditional communities from semi-arid carnauba palm, Copernicia prunifera,...
The earth is experiencing a series of epochal emergencies, directly related to the overexploitation natural resources [...]
Land subsidence due to groundwater resources extraction is one of the abundance events occurred in Iran. If it is not properly managed, this phenomenon can cause irreparable damage to the affected areas. Population growth and agricultural technology have also led to overexploitation of the groundwater resources in some parts of Iran. The rate of land subsidence due to overexploitation of the g...
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