Next to habitat loss, these invasive species represent the greatest threat to biodiversity worldwide, many ecologists say.
许多生态学家说，这些入侵物种仅次于栖息地的丧失，是对全球生物多样性的最大威胁。
The numerical effect is obvious: there are fewer salmon in degraded regions than in pristine ones; however, habitat loss also has the potential to reduce genetic diversity.
数值效应是明显的：退化地区的鲑鱼数量比原始地区少；然而，栖息地的丧失也有可能减少遗传多样性。
Poaching is the greatest threat, followed by habitat loss.
偷猎是最大的威胁，其次是栖息地丧失。
Bushmeat hunters and habitat loss are the main threats.
丛林肉猎人和丧失栖息地是主要威胁。
Habitat loss or a change in land use are frequently to blame.
栖息地的丧失和土地使用的改变经常是造成这一结果的原因。
The creatures are declining in number, primarily because of habitat loss.
这种动物的数量正在由于栖息地的消失而日益减少。
In India, massive habitat loss continues to devastate Bengal tiger populations.
在印度，大量的栖地流失造成孟加拉虎的数量持续减少。
The most serious threat, however, is the loss of warm water due to habitat loss.
而最严重的威胁是温水的减少导致的栖息地流失。
Habitat loss and climate change will be the biggest reasons for their extinction.
栖息地的消失和气候的变化将是它们灭绝的最大原因。
In general, reddish egret Numbers have declined due to human encroachment and habitat loss.
总之，人类的入侵和栖息地的丧失使棕颈鹭的数量在不断下降。
The fires, often set by pastoralists, underscore a new threat to wildlife: habitat loss.
野火通常是牧民点燃的，这对野生生物们构成了新的威胁，它们因此而失去了栖息地。
Unfortunately, habitat loss and over-harvesting are hurting the wild population numbers.
不幸的是，由于它们失去了栖息地，和人们对它们的过度捕捞，使这种野生种群的数量处于困境。
The Amur leopard is critically endangered due to habitat loss and poaching for its spotted coat.
阿穆尔豹因为栖息地减少以及偷猎皮毛加工皮衣成为极度濒危物种。
But other factors have also had an impact: habitat loss, pollution, disease and invasive species.
但是其它因素也会带来影响：栖地的流失、污染、疾病和入侵的物种。
The report highlights a number of culprits, though it is emphatic about the worst offender: habitat loss.
尽管该报告指出了一些不良后果，它强调的却是最令人痛恨的罪魁祸首：栖息地的丧失。
However, the tiger is facing the grave threat of extinction due to illegal poaching and habitat loss.
然而，由于非法偷猎和生存地丢失，老虎也面临巨大的灭绝的危险。
Of the many threats facing the endangered mountain gorilla, habitat loss is one of the most pressing.
许多面临的威胁濒危的山地大猩猩栖息地的丧失是一个最紧迫的。
Many bumblebee species are in decline, mainly because of habitat loss and likely due to introduced pathogens.
很多种类的大黄蜂其数量都在减少，这主要归咎于栖息地的丧失和病原体的引入。
"These species face a double whammy, " RAEI's Paul Hamilton said, referring to habitat loss and global warming.
栖息地的减少和全球变暖让这些稀有物种面临双重威胁。
Many are endangered and in places that are threatened by pollution, habitat loss and other human-related problems.
很多都因为环境污染、栖息地丧失、人类活动造成的相关问题，而处于濒临灭绝的危险。
He monitors birds in Costa Rica's forest fragments and agricultural areas to document the effects of habitat loss and land use.
他监测了哥斯达黎加森林带和农垦区的鸟类，以记录下栖息地流失和土地使用对鸟类灭绝所产生的影响。
Increasing habitat loss is likely to trap forest species, stopping them from seeking more favourable climates or elevations.
越来越多的生存地遭到破坏，这很可能困住森林物种，阻止它们寻找更有利的气候或是更高的海拔。
It's thought that sawfish populations have been reduced by some 90 percent due to habitat loss and accidental entanglements in fishing nets.
人们普遍认为它们之所以数量下降达90%是栖息地的减少和在捕鱼过程中的意外情况导致的。
It found that the most common threat was habitat loss, while other factors that threatened the plants included invasive species and pollution.
这项研究发现最常见的威胁是生境丢失，而其它威胁着食肉植物的因素包括入侵物种及污染。
Often, there is habitat loss from deforestation, either for farming or timber, and that leaves the animals living on small patches of land.
斯奇普说：“通常为了农业或伐木，人类开伐森林，使得动物们的栖息地由此消失。 人类只留给动物们一小块土地生活。
Species are being threatened by habitat loss and degradation, invasive species, climate change, over-exploitation, pollution and wildlife disease.
由于栖息地的丧失或退化，外来物种、气候变化、过度采伐、环境污染以及野生物疾病的影响，各类物种正在受到威胁。
Species are being threatened by habitat loss and degradation, invasive species, climate change, over-exploitation, pollution and wildlife disease.
由于栖息地的丧失或退化，外来物种、气候变化、过度采伐、环境污染以及野生物疾病的影响，各类物种正在受到威胁。
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