Species Range Shifts
Species Range Shifts - Related Videos
11:56
Non-radioactive in situ Hybridization Protocol Applicable for Norway Spruce and a Range of Plant Species
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Cited by 32 •
2009
We describe a modified DIG in situ hybridization protocol, which is fast and applicable on a wide range of plant species including Norway spruce. With just a few adjustments, including altered RNase treatment and proteinase K concentration, the protocol may be used in studies of different tissues and species.
00:59
Range
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2023
The range is one of the measures of variation. It can be defined as the difference between a dataset's highest and lowest values. For example, in the study of seven 16-ounce soda cans, the filled volume of soda was measured, thus producing the following amount (in ounces) of soda: 15.9; 16.1; 15.2; 14.8; 15.8; 15.9; 16.0; 15.5 Measurements of the amount of soda in a 16-ounce can vary since different subjects record these measurements or since the exact amount - 16 ounces of liquid, was not...
09:08
Detecting Reactive Oxygen Species
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2023
Reactive oxygen species are chemically active, oxygen-derived molecules capable of oxidizing other molecules. Because of their reactive nature, there are many deleterious effects associated with unchecked ROS production, including structural damage to DNA and other biological molecules. However, ROS can also be mediators of physiological signaling. There is accumulating evidence that ROS play significant roles in everything from activation of transcription factors to the mediation of...
07:04
Long-range Channelrhodopsin-assisted Circuit Mapping of Inferior Colliculus Neurons with Blue and Red-shifted Channelrhodopsins
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Cited by 4 •
2020
Channelrhodopsin-assisted circuit mapping (CRACM) is a precision technique for functional mapping of long-range neuronal projections between anatomically and/or genetically identified groups of neurons. Here, we describe how to utilize CRACM to map auditory brainstem connections, including the use of a red-shifted opsin, ChrimsonR.
09:12
Sound Waves and Doppler Shift
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2023
Source: Arianna Brown, Asantha Cooray, PhD, Department of Physics & Astronomy, School of Physical Sciences, University of California, Irvine, CA Waves are disturbances that propagate through a material medium or empty space. Light waves can travel through a vacuum and some forms of matter, and are transverse in nature, which means that the oscillations are perpendicular to the direction of propagation. However, sound waves are pressure waves that travel through an elastic medium like air,...
FAQs
Temperature and precipitation changes alter the conditions under which organisms can survive, reproduce, and disperse. As these conditions change geographically, populations may persist in newly suitable areas while becoming less viable elsewhere. The resulting movements can appear as poleward, elevational, or depth-related patterns, depending on how environmental conditions are distributed across the landscape or habitat.
Environmental conditions alone do not determine distribution. Habitat availability influences whether organisms can occupy an area, while interactions with other species can change the suitability of that location. Predation, competition, or other ecological relationships may therefore support, restrict, or redirect movement. Assessing these factors helps biologists explain why populations do not respond uniformly to the same environmental change.
Biologists compare distribution records across time rather than treating a single observation as permanent change. Field surveys, museum records, remote sensing, and ecological models can reveal whether a population repeatedly occupies a new area and remains associated with changed conditions. This time-based evidence helps separate short-term variation from lasting redistribution with greater confidence.
These movement patterns describe different geographic responses to changing environmental conditions. Poleward shifts indicate movement across latitude, elevational shifts occur along vertical land gradients, and depth-related shifts occur within aquatic environments. Examining the direction and type of movement helps biologists connect observed redistribution with changes in temperature, precipitation, habitat availability, or other ecological influences.
Researchers combine several evidence sources because no single method captures every aspect of redistribution. Field surveys provide direct observations, museum records extend comparisons across past time periods, remote sensing examines geographic patterns, and ecological models evaluate relationships between distributions and environmental conditions. Together, these approaches help track change, compare locations, and assess whether observed patterns are persistent.
Range-shift studies help identify conservation priorities when environmental change alters where organisms can live. Their findings can guide the design of habitat corridors that support movement and inform protected-area planning as suitable conditions change. This approach allows conservation decisions to account for redistribution rather than relying only on historical locations of populations or species.
When populations enter new areas or disappear from former ones, the set of organisms present in a community can change. These redistributions may alter community composition, meaning which populations or species occur together geographically. Biologists use range-shift evidence to evaluate climate-change impacts and to anticipate where ecological communities may differ from those documented in the past.