Productivity diversity hypothesis

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August undefined, 2024

Webb12 dec. 2024 · High productivity may increase trait/phylogenetic diversity in ecosystems with few external constraints (forests) by promoting complementary strategies, but under external constraints (managed... Webb1 maj 2009 · These results suggest that the MPD hypothesis is a viable explanation of patterns of diversity and productivity in natural stream ecosystems, and that it has …

Biodiversity and ecosystem productivity in a fluctuating ... - PNAS

Webb1 maj 2001 · Although productivity has little evolutionary meaning, population size is evolutionarily meaningful, leading to three hypotheses: (1) Diversity is higher at intermediate productivities because the ... Webbproductivity diversity hypothesis, MPD). In this study, we applied an SEM to a monitoring data set of intertidal phytoplankton communities. Our study is the first to extend a multivariate ap - proach to a marine natural ecosystem to address the following questions: (1) What are the drivers of phytoplankton productivity? (2) Do we find similar eventing time

THE RELATION BETWEEN PRODUCTIVITY AND SPECIES DIVERSITY …

Webbstrongly objected to the rejection of the diversity-stability hypothesis based solely on theory, but the idea that di-versity decreased stability, or at least did not inﬂuence it, took hold in ecology. During the next 2 decades, a variety of articles re-explored the diversity-stability hypothesis (e.g., King and Webb24 juli 2003 · If assembly sequence interacts with productivity to influence diversity, different sequences can contribute to variation in productivity–diversity relationships. … Webb24 juli 2003 · Productivity, the amount of energy available for ecosystem development in a given location, has a major effect on species diversity 20,21,22.Until recently, hump-shaped relationships, in which ... eventing the first telephone

Three evolutionary hypotheses for the hump-shaped productivity ...

Explaining productivity-diversity relationships in plants

Webb29 mars 2024 · As predictors, our global model included the additive fixed effects of four environmental measures (NPP, community diversity, community composition [DCA1] and ground cover) to address our first hypothesis and four measures of grazing (kangaroo, rabbit, cow, sheep) to address our second hypothesis and included two-way interactions … Webb1 okt. 1995 · This article argues that: (1) there are many viable mechanisms that can produce monotonic curves in the presence of competition; (2) there is little empirical support for any of the major variants of the hypothesis that productivity decreases heterogeneity, which increases competitive exclusion; and (3) there are alternative … first hour in the morning meaningWebb5 nov. 1999 · The hypothesis that biodiversity influences the productivity (that is, the rate of biomass production) and stability of ecosystems has recently resurfaced (1-3), but it remains contentious (4-6).It is unclear whether the purported effect of species diversity on ecosystem productivity is actually the hidden signature of a few important species or … eventing the future 2022

"Webb31 jan. 2024 · Background Studies on the relationship between biodiversity and ecosystem productivity have suggested that species richness and functional diversity are the main drivers of ecosystem processes. Several patterns on this relationship have been found, including positive, unimodal, negative, and neutral trends, keeping the issue … " - Productivity diversity hypothesis

Productivity diversity hypothesis

The Relationship Between Productivity and Species Richness

WebbOur model shows two major insurance effects of species richness on ecosystem productivity: (i) a buffering effect, i.e., a reduction in the temporal variance of … Webb17 jan. 2024 · Nwaiwu et al. [ 1] proposed an overview of the prevalent microorganisms associated with nine traditional and artisanal fermented beverages in Nigeria such as soymilk, nono (fermented cow milk), tiger nut milk, yoghurt, kunu, zobo, palm wine and the local beers pito and brukutu. They compiled studies in which bacteria of the genera …

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Webb1 sep. 2014 · The “intermediate disturbance hypothesis” and the “intermediate productivity hypothesis” have been widely recognized concepts for explaining patterns of species … Webb20 apr. 2024 · A test of the multivariate productivity-diversity hypothesis in streams. Ecology 90 , 1227–1241 (2009). Article PubMed Google Scholar

WebbAbstract Recent overviews have suggested that the relationship between species richness and productivity (rate of conversion of resources to biomass per unit area per unit time) is unimodal (hump-shaped).Most agree that productivity affects species richness at large scales, but unanimity is less regarding underlying mechanisms. Recent studies have … Webb1 nov. 2008 · An alternative ecological hypothesis for productivity–diversity relationships documented here concerns the sequence of community assembly (Fukami and Morin 2003). For example, the sequence of community assembly by invertebrates recruiting on navigational buoys in this study differs from one area to another.

Webb1 maj 2001 · We consider the problem of the hump-shaped relationship between productivity and diversity from an evolutionary perspective, based on the assumption … Webbhypothesis theoretically. We develop a general stochastic dynamic model to assess the effects of species richness on the expected temporal mean and variance of ecosystem …

Webb25 okt. 2024 · The main hypotheses explaining spatial diversity gradients are (1) the metabolic theory of ecology, relating higher mutation and speciation rates towards warmer areas , and (2) the productivity-diversity hypothesis, focusing on the positive effect of resources on species coexistence and diversity .

WebbHere we present empirical evidence for the multivariate productivity-diversity (MPD) hypothesis, which argues that differing perspectives on productivity-diversity … eventing vest cheap tipperaryWebb1 sep. 2014 · Abstract. The “intermediate disturbance hypothesis” and the “intermediate productivity hypothesis” have been widely recognized concepts for explaining patterns … eventing the futureWebb1 okt. 1995 · This article discusses two types of proposed relationships between resource productivity and the diversity of coexisting consumer species. Monotonically increasing … eventing victoria calendarWebbSpecies diversity is the number of different species that are represented in a given community (a dataset). The effective number of species refers to the number of equally abundant species needed to obtain the same mean proportional species abundance as that observed in the dataset of interest (where all species may not be equally abundant). ). … eventing usaWebb23 sep. 2011 · An alternative hypothesis states that productivity sets the upper limit on richness, with stochastic forces such as disturbance causing deviations below this limit (3, 23). We tested for a hump-shaped constraint on maximum richness by conducting quantile regressions on our data at within-site and global extents (we did not have sufficient data … first hot wheel car ever madeWebb15 okt. 2024 · Diversity encourages innovation through the vibrant exchange of ideas, a recent study found. This can ramp up productivity and success in countries where it is … first hour rating electric water heaterWebb4 sep. 2024 · The Productivity Hypothesis says that the more energy there is in a system, the more biomass there will be in that system. More biomass supports greater species … first hour rating vs recovery rate