Population fragmentation is a form of population segregation. It is often caused by habitat fragmentation. Population fragmentation causes inbreeding depression, which leads to a decrease in genetic variability in the species involved. This decreases the fitness of the population for several reasons. First, inbreeding forces competition with relatives, which decreases the evolutionary fitness of the species. Secondly, the decrease in genetic variability causes an increased possibility a lethal homozygous recessive trait may be expressed; this decreases the average litter size reproduced, indirectly decreasing the population. When a population is small, the influence of genetic drift increases, which leads to less and/or random fixation of alleles. In turn, this leads to increased homozygosity, negatively affecting individual fitness. The performance of plants may be compromised by less effective selection which causes an accumulation of deleterious mutations in small populations. Since individuals in small populations are more likely to be related, they are more likely to inbreed. A reduction in fitness may occur in small plant populations because of mutation accumulation, reduced genetic diversity, and increased inbreeding. Over time, the evolutionary potential and a species’s ability to adapt to a changing environment, such as climate change, is decreased.
... stability of animal populations under human care ... Their populations continue to face significant threats, including habitat loss, fragmentation, vehicle collisions and illegal poaching for their pelts.
... diversity of the population ... Researchers want to replicate the study elsewhere in Cambodia and in other countries, such as neighboring Vietnam where the Asian elephants live in fragmented populations.
The population is so fragmented that the black poplar has effectively died out in the wild ... “With numbers in huge decline this is not something likely to happen in the wild which is why we are stepping in to create a new breeding population.
... diversity of the population ... Researchers want to replicate the study elsewhere in Cambodia and in other countries, such as neighboring Vietnam where the Asian elephants live in fragmented populations.
This effort presents significant challenges due to fragmented federal and provincial efforts, coupled with the absence of an inclusive setting and enabling environment for a transformative population agenda at the upstream level.
Experts originally thought that the fossilised fragments belonged to the species Homo antecessor – an extinct early human known to have inhabited the area about 860,000 years ago ... The fragments were ...
Fossilized bone fragments unearthed in a cave in northern Spain in 2022 have revealed a previously unknown human population that lived more than 1.1 million years ago, according to new research.
Potential factors influencing gray fox populations include habitat loss and fragmentation, changing mesocarnivore (e.g., coyote) community structure and disease, the release stated.
Srinagar... The Hurriyat further stated that the Indian administration is employing divide-and-rule tactics by fragmenting Jammu and Kashmir’s population along religious, regional, ethnic, and political lines to suppress collective aspirations ... ....
The Middle East’s food and grocery delivery market has witnessed rapid growth, propelled by increasing urbanization, a young tech-savvy population, and changing consumer preferences towards online shopping.
Sightings of big cats—both leopards and tigers—around Kalagarh Tiger Reserve have increased in the recent past due to multiple factors, including anthropogenic pressure due to urbanisation close to the forests and fragmentation of wildlife corridors.
The aloe was listed as critically endangered after a survey in 2016 found its overall population numbers to have dropped by an estimated 43% in a decade ... Very few fragments of intact habitat are left in Gauteng because of urban sprawl.
'Karachi alone has a big population of people who speak Gujarati, with many more in Hyderabad, Thatta and Badin.' Political upheavals and social tensions have further complicated preservation efforts.
American Association for the Advancement of Science discovered that one third of American’s population believes that human beings have existed in their current form since the beginning of time.
Cascade Business News
11 Mar 2025
Cascade Business News
11 Mar 2025