As a result, diversity takes second place in terms of the factors to be considered in the context
of ecosystem stability.
The study is unusual because it looks at several factors that
affect ecosystem stability at the same time over a long period in a setting that kept other potential variables constant.
But even small webs can harbor complexities that can make the order of removals
for ecosystem stability challenging to sort out.
«We need to understand the relationships between the species we're driving to extinction, and the roles they play
in ecosystem stability,» says Roopnarine.
It found that all of the human - induced changes affected the productivity of the grassland plots, but only those that reduced biodiversity
reduced ecosystem stability.
In fact, two of the 13 chapters specifically
address ecosystem stability issues, using disruptions of marine and forest ecosystems as examples, topics which may or may not have obvious ties to human health issues.
Researchers led by Hans de Boeck from the University of Antwerp report that they looked at a wide range of studies of what scientists
call ecosystem stability and biodiversity during climate extremes — that is, unusual heat, drought or flooding.
Non-linear responses to increasing rainfall variability may be expected, as ecosystem models of mixed C3 / C4 grasslands show initially positive NPP relationships with increasing rainfall variability, but greater variability ultimately reduces both NPP and
ecosystem stability even if the rainfall total is kept constant (Mitchell and Csillag, 2001).
These findings call into question studies usually carried out in ecology, in which measurements
of ecosystem stability are partly based on their ability to return to normal following a disturbance, rather than on their capacity to resist such a disturbance.
«The evidence is overwhelming that hundreds of the native bees we depend on
for ecosystem stability, as well as pollination services worth billions of dollars, are spiraling toward extinction,» says Kelsey Kopec, a native pollinator researcher at the Center and author of the study.
Floral diversity has been shown to contribute to
ecosystem stability, while the invertebrate community associated with field boundaries performs many ecosystem functions including biological control of pests and diseases, pollination and food resource for higher trophic levels.
The study, led by Yann Hautier a Marie Curie Fellow associated with the College of Biological Sciences at the University of Minnesota and with the University of Oxford, U.K., looked at 28 years» worth of data on plant growth, number of species,
ecosystem stability and exposure to changes in nitrogen, carbon dioxide, fire, grazing and water collected from experimental grassland plots at Cedar Creek Ecosystem Science Reserve near East Bethel as part of other studies.
Phenomena such as species» migration, extinction, intrusion;
ecosystem stability; decline of pollinators and pest invasion have to be monitored closely and identified momentarily.
Their roles are crucial to
ecosystem stability and their loss can result in particularly rapid, widespread and potentially irrevocable changes [13,14,18,48].
The study presented here highlights current knowledge gaps and provides research recommendations so that ecologists can gain a deeper understanding of the linkages between biodiversity and
ecosystem stability in a changing world.
There's a lot more to
ecosystem stability than the role of honeybees in crop pollination.»
There is still much that we need to know before we can stop the decline in the insect pollinators on which we depend for our food supply and
ecosystem stability.»
Ecosystem stability is based on interdependence among constituent species and with biodiversity loss, resilience to change is reduced.