Contents
What is spatial scale in ecology?
Scale. In spatial ecology, scale refers to the spatial extent of ecological processes and the spatial interpretation of the data. The response of an organism or a species to the environment is particular to a specific scale, and may respond differently at a larger or smaller scale.
What is the spatial scale?
Spatial scale is a specific application of the term scale for describing or categorizing (e.g. into orders of magnitude) the size of a space (hence spatial), or the extent of it at which a phenomenon or process occurs.
What are examples of spatial scale in geography?
In geography, we often focus on spatial scale. Spatial scale is the extent of an area at which a phenomenon or a process occurs. For example, water pollution can occur at a small scale, such as a small creek, or at a large scale, such as the Chesapeake Bay.
What are spatial scales on a map?
Spatial scale has traditionally been defined by cartographers as the ratio between a distance on a map to the same distance in reality. When describing spatial scale, it is important to distinguish between two types of scale: scales of measurement and scales of variation.
What are the four spatial scales?
In the context of digital technology, Goodchild (2001b) categorized four meanings for the term scale: (1) implication of level of spatial detail, (2) representative fraction, (3) spatial extent and (4) process scale.
What is spatial scale in GIS?
SPATIAL SCALE. Spatial scale involves grain & extent: Grain: the size of your pixel & the smallest resolvable unit. Extent: the size of your study area & the largest resolvable unit. Common grain sizes: • 30m – Landsat satellite imagery.
What are the components of scale?
There are several components of scale, but the two most important for our purposes are “grain” and “extent”: Grain The minimum spatial resolution of the data–in raster lattice data, the cell size; in field sample data, the quadrat size; in imagery, the pixel size; in vector GIS data, the minimum mapping unit (polygon).
Why Does scale matter in geography?
Scale is the great enabler for representation of the earth’s surface and features and provides the unique zoom capacity for the study of geographical features and phenomena.
How is scaling and complexity in landscape ecology?
Modeling processes and interactions at the landscape scale, including future states of biological communities and their interactions with each other and with processes such as landscape fire, requires quantitative metrics and algorithms that minimize error propagation across scales.
How are scale dependence and emergence related in ecology?
Ecological landscapes have feedbacks and interactions across scales, and show scale dependence, whether they appear to be simple or complex ( Wu and David, 2002; Figure 1 ). Indeed, properties such as scale dependence and emergence are not simply features that complex systems share; they are diagnostic attributes of them.
How are landscapes and ecological processes inherently complex?
Landscapes and the ecological processes they support are inherently complex systems, in that they have large numbers of heterogeneous components that interact in multiple ways, and exhibit scale dependence, non-linear dynamics, and emergent properties.