Ecosystem Scale Manipulation
Ecosystem Scale Manipulation - Related Videos
09:38
Understanding Dissolved Organic Matter Biogeochemistry Through In Situ Nutrient Manipulations in Stream Ecosystems
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Cited by 3 •
2016
Dissolved organic matter provides an important source of energy and nutrients to stream ecosystems. Here we demonstrate a field-based method to manipulate the ambient pool of dissolved organic matter in situ through easily replicable nutrient pulses.
01:17
What is an Ecosystem?
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2019
Overview An ecosystem is the interaction between all abiotic and biotic factors in an environment and can be classified as terrestrial or aquatic. Terrestrial ecosystems are categorized based on the climate, including annual temperature, rainfall, and seasonality. Aquatic ecosystems are separated further into freshwater and marine, and then by depth, which influences water temperature and the amount of sunlight that penetrates the water. Terrestrial Ecosystems Terrestrial ecosystems are...
06:00
Experimental Manipulation of Body Size to Estimate Morphological Scaling Relationships in Drosophila
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Cited by 29 •
2011
Morphological scaling relationships capture and describe organismal shape. We present a method to measure morphological scaling relationships across the natural range of body sizes in fully metamorphic insects. Using a simple diet manipulation we increase the distribution of trait sizes, permitting the accurate description of how shape and size co-vary.
10:48
Nutrients in Aquatic Ecosystems
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2023
Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University Nitrogen and phosphorus are essential plant nutrients found in aquatic ecosystems and both are monitored as a part of water quality testing because in excess amounts they can cause significant water quality problems. Nitrogen in water is measured as the common form nitrate (NO3-) that is dissolved in water and readily absorbed by photosynthesizers such as algae. The common form of phosphorus measured is phosphate...
13:27
Osteopathic Manipulative Treatment as a Useful Adjunctive Tool for Pneumonia
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Cited by 50 •
2014
Pneumonia is one of the top ten leading causes of death in the U.S. Osteopathic manipulative techniques (OMT) may be utilized as an adjunctive therapy in the treatment of pneumonia to enhance biomechanical and immune function; and ultimately, to reduce hospital stay, duration of antibiotics, incidence of respiratory failure, and mortality. In this video-article, we will review randomized controlled studies on the use of OMT in pneumonia patients, as well as demonstrate specific hands-on...
FAQs
Changing habitat size or connectivity can modify how often organisms encounter one another, how readily they disperse, and how strongly edges influence conditions. These changes may also reshape feedbacks between organisms and their surroundings. Comparing otherwise similar habitats at different scales therefore helps determine whether an observed interaction or ecosystem response depends mainly on local space, broader spatial connections, or both.
Scale can affect biological outcomes through mechanisms other than spatial extent itself. Differences in resources, species composition, or environmental conditions could independently change interactions, productivity, or biodiversity. Controlling or documenting these factors allows researchers to attribute contrasting results more confidently to scale-related effects rather than to uncontrolled differences among plots, enclosures, mesocosms, or landscape units.
They can show whether ecological patterns arise primarily within a habitat unit or depend on connections among units. For example, a response that appears in individual plots but changes across connected landscape units suggests different spatial controls than a response that emerges only at broader extent. This distinction strengthens interpretation of biodiversity and productivity patterns across biological systems.
Researchers compare experimental habitats that differ in spatial extent, size, or connectivity, using units such as plots, enclosures, mesocosms, or landscape areas. They then control or record resource availability, species composition, and environmental conditions while measuring biological interactions or ecosystem function. The comparison is most informative when scale differs clearly and accompanying conditions are documented consistently.
The approach helps test whether fragmented or restored habitats support biological interactions and ecosystem functions at only local scales or across connected areas. By comparing spatial arrangements and extents, researchers can examine how connectivity and edge effects influence biodiversity or productivity. These results can inform predictions about whether management should focus on individual habitat units, connections among them, or both.
Responses to climate change may differ between small experimental units and broader landscape contexts because dispersal, encounter rates, edge effects, and organism-environment feedbacks change with spatial extent. Testing multiple scales exposes these differences and helps identify which processes remain local and which depend on wider connections. The resulting evidence can improve ecosystem-management predictions without assuming that small-scale results apply everywhere.