Habitat Shrinkage
Habitat Shrinkage - Related Videos
02:31
Habitat Fragmentation
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2020
Habitat fragmentation describes the division of a more extensive, continuous habitat into smaller, discontinuous areas. Human activities such as land conversion, as well as slower geological processes leading to changes in the physical environment, are the two leading causes of habitat fragmentation. The fragmentation process typically follows the same steps: perforation, dissection, fragmentation, shrinkage, and attrition. Perforation and dissection often occur during the initial stages of...
01:27
Shrinkage in Concrete
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2024
Shrinkage in concrete is primarily due to water loss from evaporation, hydration of cement, or carbonation, leading to a reduction in volume. The volumetric contraction results in volumetric strain in concrete. However, in practice, shrinkage is measured as linear strain, which is one-third of the volumetric strain. When concrete is still in its plastic state, it can undergo a decrease in volume by about 1% of its absolute volume. This decrease is known as plastic shrinkage. It arises either...
01:21
Drying Shrinkage
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2024
When hardened concrete is exposed to air with a relative humidity of less than 100 percent, it begins to lose the free water within its capillaries. As this water evaporates, the water initially adsorbed onto the calcium silicate hydrates migrates towards these now empty spaces and eventually evaporates as well. Over time, as more water leaves, the volume of the concrete decreases, a phenomenon known as drying shrinkage. A portion of this drying shrinkage can be reversed; if the concrete is...
01:24
Carbonation Shrinkage
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2024
Atmospheric CO2 penetrates the concrete's pores and, in the presence of moisture, forms carbonic acid, which then reacts with calcium hydroxide in the hydrated cement, forming calcium carbonate. This process reduces the concrete's volume and is termed carbonation shrinkage. The concrete's permeability is slightly reduced as calcium carbonate produced during the reaction fills its pores. Furthermore, its strength is slightly enhanced as the water released during the reaction facilitates the...
08:45
Shrinkage of Dental Composite in Simulated Cavity Measured with Digital Image Correlation
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Cited by 12 •
2014
In order to understand the spatial development of polymerization shrinkage stress in dental resin-composite restorations, Digital Image Correlation was used to provide full-field displacement/strain measurement of restored model glass cavities by correlating images of the restoration taken before and after polymerization.
FAQs
When available habitat becomes smaller, individuals may have less access to food, shelter, breeding sites, and movement corridors. These losses can alter population dynamics because organisms must compete for remaining resources and may have fewer opportunities to reproduce or move through the landscape. The resulting changes help explain why habitat loss can affect both population viability and broader ecological communities.
Smaller, separated habitat patches can limit movement between groups of the same species. With fewer connections across the landscape, gene flow may decline, leaving populations more isolated from one another. This pattern is important in biology because landscape structure becomes linked to population dynamics and can contribute to increased extinction risk when viable populations cannot be maintained.
As habitat contracts, individuals may be concentrated in fewer remaining areas with limited food, shelter, or breeding sites. Greater competition for these resources can place additional pressure on populations already affected by reduced space and movement. If isolation and resource limitations persist, the likelihood of maintaining a viable population may decrease, increasing concern about extinction risk.
Land conversion, resource extraction, and climate change are identified as important pressures that can reduce habitat availability. Their biological effects are expressed through changes in the space and resources accessible to species or ecological communities. Examining these pressures helps researchers connect landscape change with population dynamics, biodiversity loss, and changes in ecosystem function.
Biologists examine how changes in landscapes relate to population dynamics, biodiversity loss, and ecosystem function. This approach connects the condition of available habitat with outcomes for species and ecological communities rather than considering landscape change in isolation. The resulting evidence can clarify which biological processes are most affected and inform strategies for maintaining viable populations.
Research on habitat shrinkage can show how landscape change influences population size and persistence, biodiversity, and ecosystem function. It can also highlight the importance of access to breeding sites, resources, and movement corridors. These findings provide a biological basis for evaluating conservation needs and deciding whether protection, restoration, or improved landscape connectivity should be emphasized.
Wildlife corridors become relevant when shrinking habitat leaves populations in smaller or more isolated patches. Maintaining or improving connections can help preserve movement routes across the landscape, addressing one consequence of habitat contraction identified in biology. Corridor planning is therefore part of conservation strategies intended to support viable populations while landscapes continue to change.
Habitat protection can conserve remaining areas that provide food, shelter, breeding sites, and movement routes, while ecological restoration can support recovery where habitat has been degraded or reduced. Used alongside wildlife corridors, these strategies aim to reduce the biological consequences of landscape change, protect biodiversity, and maintain populations capable of persisting in changing environments.