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Empirical support for the biogeochemical niche hypothesis in forest
The biogeochemical niche hypothesis is thus able to quantify species-specific tree niches and their shifts in response to environmental changes. ... atmospheric N deposition and soil type together ...
Niches and distributional areas: Concepts, methods, and ...
For example, the two niche concepts cited above differ in types of variables used [resources or other dynamically linked requirements, vs. relatively static conditions, which are the bionomic and scenopoetic variables of Hutchinson , respectively]; the abstract objects constituting niches (sets of vectors vs. regions in phase-spaces); and the ...
Niche specialization and community niche space increase with species
INTRODUCTION. Understanding the mechanisms underlying niche occupancy variation and species richness is a fundamental goal of ecological research (Hutchinson, 1957; Li et al., 2018).MacArthur proposed the niche-packing hypothesis, which states that species can coexist in diverse communities by modifying their niche breadth through two nonexclusive mechanisms: the narrowing of each coexisting ...
The dimensionality of niche space allows bounded and unbounded ...
In agreement with the bounded hypothesis, niche competition constrained diversification, and in line with the unbounded hypothesis, niche evolution and partitioning promoted diversification ...
Principles of niche expansion
For many years, the niche variation hypothesis (NVH) ... Which principal paths of niche expansion are taken by a population depends on (i) the variation of resource types in the accessible vacant niche space and (ii) what we call the cost of individual generalization, meaning a resource-acquisition trade-off between individual niche width (the ...
Beyond resource limitation: an expanded test of the niche dimension
The niche dimension hypothesis predicts that more species can coexist given a greater number of niche axes along which they partition the environment. Although this hypothesis has been broadly supported by nutrient enrichment experiments, its applicability to other ecological factors, such as natural enemies and abiotic stresses, has not been vigorously tested. Here, we examined the generality ...
Aboveground and belowground biogeochemical niche separation ...
The biogeochemical niche hypothesis uses species-specific elemental concentrations and ratios as parameters to quantify the niche concepts and it has been verified by previous studies (Hu et al. 2018; Peñuelas et al. 2008), which focused on the different elemental concentrations of aboveground tissues.
Heterogeneity-diversity relationships differ between and ...
The habitat heterogeneity hypothesis is one of the central pillars of ecological theory. It states that spatial heterogeneity in abiotic and biotic conditions increases niche dimensionality (that ...
Ecological niche modeling, niche overlap, and good old Rabinowitz's
We classified our focal species according to Rabinowitz's types of rarity and tested niche volume hypothesis that widespread species with low habitat specificity, and continuous populations have larger niche volume compared to narrow species, with high habitat specificity and scattered populations. We showed that there is a significant ...
Niche breadth and elevational range size: a comparative study on Middle
The niche-breadth hypothesis builds on the concept of the ecological niche, defined as the abiotic and biotic conditions needed by a species to maintain viable populations [].The niche breadth of a species is often depicted as the width of the performance curves along gradients of environmental conditions [].If greater niche breadth is associated with larger range sizes, it is taken as support ...
The future of microbial ecological niche theory and modeling
Niche theory, the description of an organism's environmental requirements for survival and reproduction, has been a central tenet of ecology for decades (Hutchinson, 1957).While plant (Enquist et al., 2016) and animal (Moran-Ordonez et al., 2017) niches have been extensively studied, characterization of microbial niches has lagged behind that of larger flora and fauna.
Trophic niche size and overlap decreases with increasing ecosystem
Niche size of both species was inversely related to seagrass productivity, consistent with the hypothesis that increasing productivity allows species to focus on a narrower diet. This pattern describes the relationship between ecosystem production and niche size and provides an empirical ecological explanation for the resource maximization ...
Latitudinal gradients in biotic niche breadth vary across ecosystem types
One proposed link between species richness and latitude is the 'latitude-niche breadth hypothesis' . This hypothesis predicts that decreased seasonality in the tropics should lead to more stable populations, which in turn should evolve smaller niches . These narrow niches should therefore allow more species to coexist in the tropics than at ...
Beyond resource limitation: an expanded test of the niche dimension
The niche dimension hypothesis predicts that more species can coexist given a greater number of niche axes along which they partition the environment. Although this hypothesis has been broadly supported by nutrient enrichment experiments, its applicability to other ecological factors, such as natura …
Niches & competition (article)
The niche concept. A species' niche is its ecological role or "way of life," which is defined by the full set of conditions, resources, and interactions it needs (or can make use of) 1 . Each species fits into an ecological community in its own special way and has its own tolerable ranges for many environmental factors.
Soundscape ecology
The niche hypothesis (also known as the acoustic niche hypothesis; ANH), an early version of the term biophony, describes the acoustic bandwidth partitioning process that occurs in still-wild biomes by which non-human organisms adjust their vocalizations by frequency and time-shifting to compensate for vocal territory occupied by other vocal ...
Beyond resource limitation: an expanded test of the niche dimension
hypothesis for multiple types of niche axes Xuebin Y an 1 · Je rey Diez 2 · Kailing Huang 1 · Shaopeng Li 3,4 · Xi L uo 1 · Xinyu Xu 1 · Fanglong Su 1 · Lin Jiang 5 ·
Niche diversity can explain cross-cultural differences in ...
To explain these results, we propose the niche diversity hypothesis, in which a greater diversity of social and ecological niches elicits a broader range of multivariate behavioural profiles and ...
Beyond resource limitation: an expanded test of the niche dimension
Mast fruiting of large ectomycorrhizal African rain forest trees: importance of dry season intensity, and the resource-limitation hypothesis New Phytologist 10.1111/j.1469-8137.2006.01691.x
Ecological Niche
The three vital aspects of an ecological niche are - physical level, function role and its position in the environmental gradient. Based on this, ecological niche can be classified into three types -. Habitat or Spatial Niche. Trophic Niche. Hypervolume Niche.
Research Hypothesis: Definition, Types, Examples and Quick Tips
3. Simple hypothesis. A simple hypothesis is a statement made to reflect the relation between exactly two variables. One independent and one dependent. Consider the example, "Smoking is a prominent cause of lung cancer." The dependent variable, lung cancer, is dependent on the independent variable, smoking. 4.
Beyond resource limitation: an expanded test of the niche dimension
The niche dimension hypothesis predicts that more species can coexist given a greater number of niche axes along which they partition the environment. Although this hypothesis has been broadly supported by nutrient enrichment experiments, its applicability to other ecological factors, such as natural enemies and abiotic stresses, has not been ...
Niche-DE: niche-differential gene expression analysis in spatial
A Schematic of effective niche calculation: We aim to quantify the cell-type composition of each cell's neighborhood. For each index cell, we calculate the pairwise kernel distance similarity between itself and each other cell in the sample. We use a Gaussian kernel with bandwidth \(\sigma\).The effective niche for the index cell is a vector with dimension equal to the number of unique cell ...
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The biogeochemical niche hypothesis is thus able to quantify species-specific tree niches and their shifts in response to environmental changes. ... atmospheric N deposition and soil type together ...
For example, the two niche concepts cited above differ in types of variables used [resources or other dynamically linked requirements, vs. relatively static conditions, which are the bionomic and scenopoetic variables of Hutchinson , respectively]; the abstract objects constituting niches (sets of vectors vs. regions in phase-spaces); and the ...
INTRODUCTION. Understanding the mechanisms underlying niche occupancy variation and species richness is a fundamental goal of ecological research (Hutchinson, 1957; Li et al., 2018).MacArthur proposed the niche-packing hypothesis, which states that species can coexist in diverse communities by modifying their niche breadth through two nonexclusive mechanisms: the narrowing of each coexisting ...
In agreement with the bounded hypothesis, niche competition constrained diversification, and in line with the unbounded hypothesis, niche evolution and partitioning promoted diversification ...
For many years, the niche variation hypothesis (NVH) ... Which principal paths of niche expansion are taken by a population depends on (i) the variation of resource types in the accessible vacant niche space and (ii) what we call the cost of individual generalization, meaning a resource-acquisition trade-off between individual niche width (the ...
The niche dimension hypothesis predicts that more species can coexist given a greater number of niche axes along which they partition the environment. Although this hypothesis has been broadly supported by nutrient enrichment experiments, its applicability to other ecological factors, such as natural enemies and abiotic stresses, has not been vigorously tested. Here, we examined the generality ...
The biogeochemical niche hypothesis uses species-specific elemental concentrations and ratios as parameters to quantify the niche concepts and it has been verified by previous studies (Hu et al. 2018; Peñuelas et al. 2008), which focused on the different elemental concentrations of aboveground tissues.
The habitat heterogeneity hypothesis is one of the central pillars of ecological theory. It states that spatial heterogeneity in abiotic and biotic conditions increases niche dimensionality (that ...
We classified our focal species according to Rabinowitz's types of rarity and tested niche volume hypothesis that widespread species with low habitat specificity, and continuous populations have larger niche volume compared to narrow species, with high habitat specificity and scattered populations. We showed that there is a significant ...
The niche-breadth hypothesis builds on the concept of the ecological niche, defined as the abiotic and biotic conditions needed by a species to maintain viable populations [].The niche breadth of a species is often depicted as the width of the performance curves along gradients of environmental conditions [].If greater niche breadth is associated with larger range sizes, it is taken as support ...
Niche theory, the description of an organism's environmental requirements for survival and reproduction, has been a central tenet of ecology for decades (Hutchinson, 1957).While plant (Enquist et al., 2016) and animal (Moran-Ordonez et al., 2017) niches have been extensively studied, characterization of microbial niches has lagged behind that of larger flora and fauna.
Niche size of both species was inversely related to seagrass productivity, consistent with the hypothesis that increasing productivity allows species to focus on a narrower diet. This pattern describes the relationship between ecosystem production and niche size and provides an empirical ecological explanation for the resource maximization ...
One proposed link between species richness and latitude is the 'latitude-niche breadth hypothesis' . This hypothesis predicts that decreased seasonality in the tropics should lead to more stable populations, which in turn should evolve smaller niches . These narrow niches should therefore allow more species to coexist in the tropics than at ...
The niche dimension hypothesis predicts that more species can coexist given a greater number of niche axes along which they partition the environment. Although this hypothesis has been broadly supported by nutrient enrichment experiments, its applicability to other ecological factors, such as natura …
The niche concept. A species' niche is its ecological role or "way of life," which is defined by the full set of conditions, resources, and interactions it needs (or can make use of) 1 . Each species fits into an ecological community in its own special way and has its own tolerable ranges for many environmental factors.
The niche hypothesis (also known as the acoustic niche hypothesis; ANH), an early version of the term biophony, describes the acoustic bandwidth partitioning process that occurs in still-wild biomes by which non-human organisms adjust their vocalizations by frequency and time-shifting to compensate for vocal territory occupied by other vocal ...
hypothesis for multiple types of niche axes Xuebin Y an 1 · Je rey Diez 2 · Kailing Huang 1 · Shaopeng Li 3,4 · Xi L uo 1 · Xinyu Xu 1 · Fanglong Su 1 · Lin Jiang 5 ·
To explain these results, we propose the niche diversity hypothesis, in which a greater diversity of social and ecological niches elicits a broader range of multivariate behavioural profiles and ...
Mast fruiting of large ectomycorrhizal African rain forest trees: importance of dry season intensity, and the resource-limitation hypothesis New Phytologist 10.1111/j.1469-8137.2006.01691.x
The three vital aspects of an ecological niche are - physical level, function role and its position in the environmental gradient. Based on this, ecological niche can be classified into three types -. Habitat or Spatial Niche. Trophic Niche. Hypervolume Niche.
3. Simple hypothesis. A simple hypothesis is a statement made to reflect the relation between exactly two variables. One independent and one dependent. Consider the example, "Smoking is a prominent cause of lung cancer." The dependent variable, lung cancer, is dependent on the independent variable, smoking. 4.
The niche dimension hypothesis predicts that more species can coexist given a greater number of niche axes along which they partition the environment. Although this hypothesis has been broadly supported by nutrient enrichment experiments, its applicability to other ecological factors, such as natural enemies and abiotic stresses, has not been ...
A Schematic of effective niche calculation: We aim to quantify the cell-type composition of each cell's neighborhood. For each index cell, we calculate the pairwise kernel distance similarity between itself and each other cell in the sample. We use a Gaussian kernel with bandwidth \(\sigma\).The effective niche for the index cell is a vector with dimension equal to the number of unique cell ...