Declining biodiversity lowers an ecosystem's productivity (the amount of food energy that is converted into the biomass) and lowers the quality of the ecosystem's services (which often include maintaining the soil, purifying water that runs through it, and supplying food and shade, etc.). https://www.britannica.com/science/biodiversity-loss
Loss of biodiversity appears to affect ecosystems as much as climate change, pollution and other major forms of environmental stress, according to results of a new study by an international research team. ... Studies over the last two decades demonstrated that more biologically diverse ecosystems are more productive. https://www.nsf.gov/news/news_summ.jsp?cntn_id=124016
A UN-backed report says a million species are at risk of extinction, and warns biodiversity loss and failure to conserve ecosystems has catastrophic effects on people as well as nature. They are the tireless stewards of the air, water and land from which we live. But the millions of species whose toil underpins our prosperity are gravely endangered by human activity, scientists say — and that imperils us in turn. Biodiversity loss is as big a threat to humans as climate change, said UN biodiversity chief Robert Watson last week at a conference in Paris to release a landmark report on global biodiversity and ecosystems. https://www.alumniportal-deutschland.org/en/global-goals/sdg-15-terrestrial-ecosystems/loss-of-biodiversity-and-its-consequences/
"The continuing loss of biodiversity will undermine our ability for poverty reduction, food and water security, human health and the overall goal of leaving nobody behind." The report, the first of its kind since 2005 and published by the Intergovernmental Panel on Biodiversity and Ecosystem Services (IPBES), warns of grave consequences to humanity from mass die-offs and degradation of nature. Drawing together the work of more than 400 experts, it paints a bleak picture of a world in which essentials such as food and drinking water are endangered through species and ecosystem decline. https://www.alumniportal-deutschland.org/en/global-goals/sdg-15-terrestrial-ecosystems/loss-of-biodiversity-and-its-consequences/
I did a study on biodiversity in a river in Kenya and found that there was too much predators than prey when it came to macro-invertebrates. The culprit for this observation was agricultural activities near the river banks.
Loss of biodiversity has a profound effect on the loss of ecosystem especially, terrestrial ecosystem. A complex web of inter-relationship of various species exists in an ecosystem and loss of a species can have a profound effect on the remaining species of the ecosystem thus causing imbalance in the ecosystem.
I have worked on habitat destruction and its impact on the loss of biodiversity. For more ideas, you can check my congress poster. I hope it helps.. Poster A STUDY ON EUPHLYCTIS IN SELECTED AREAS OF KARACHI WITH REFE...
Biodiversity in our planet earth has been declining alarmingly due to human interference such as pollution, over exploitation and habitat uses and habitat loss, thus having effects on its ecology mainly terrestrial. On the other hand, conversion of terrestrial ecosystems for human benefit will also cause a decline on its biodiversity. So, biodiversity loss lowers the productivity of different ecosystems and hence functioning of ecosystems.
The consequences of biodiversity loss on terrestrial ecosystems can be quite enormous including the distortion of ecosystem processes and services like erosion control, carbon sequestration, nutrient cycling and soil quality amelioration among many others.
Kindly check the sites below.
The Loss of Diversity Causes and Consequences - Biodiversity