Impact of different shade coffee management scenarios, on a population of <i>Oncidium poikilostalix</i> (Orchidaceae), in Soconusco, Chiapas, Mexico

García-González, Alfredo; Damon, Anne; Raventós, José; Riverón-Giró, Frander B.; Mújica, Ernesto; Solis‐Montero, Lislie

doi:10.1080/17550874.2017.1315840

Cited by 9 publications

(2 citation statements)

References 32 publications

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“…Moreover, artificial control of vital parameters with higher sensitivity may protect endangered species [ 12 ]. Many such applications have been developed in the ecological field [ 13 – 18 ]. Caswell summarizes the methodology [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

Sensitivity analysis on the declining population in Japan: Effects of prefecture-specific fertility and interregional migration

et al. 2022

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Japan has been facing a population decline since 2010 due to low birth rates, interregional migration, and regional traits. In this study, we modeled the demographic dynamics of Japan using a transition matrix model. Then, from the mathematical structure of the model, we quantitatively evaluated the domestic factors of population decline. To achieve this, we constructed a multi-regional Leslie matrix model and developed a method for representing the reproductive value and stable age distribution using matrix entries. Our method enabled us to interpret the mathematical indices using the genealogies of the migration history of individuals and their ancestors. Furthermore, by combining our method with sensitivity analysis, we analyzed the effect of region-specific fertility rates and interregional migration rates on the population decline in Japan. We found that the sensitivity of the population growth rate to the migration rate from urban areas with large populations to prefectures with high fertility rates was greatest for people aged under 30. In addition, compared to other areas, the fertility rates of urban areas exhibited higher sensitivity for people aged over 30. Because this feature is robust in comparison with those in 2010 and 2015, it can be said to be a unique structure in Japan in recent years. We also established a method to represent the reproductive value and stable age distribution in an irreducible non-negative matrix population model by using the matrix entries. Furthermore, we show the effects of fertility and migration rates numerically in urban and non-urban areas on the population growth rates for each age group in a society with a declining population.

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Section: Introductionmentioning

confidence: 99%

Sensitivity analysis on the declining population in Japan: Effects of prefecture-specific fertility and interregional migration

et al. 2022

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“…However useful the TF is for easily calculating the nonlinear λ response on a matrix element perturbation, it may just as easily provide biologically impossible results without warning. Although some potential errors are mentioned in the literature, they are not stressed, they are not guarded against in packaged TF routines, and as a result they are being reported as true results in the literature (e.g., García-Gonz alez et al, 2017). The TF offers powerful inference and is more useful for predicting population change in response to management or environmental change than any existing tool to date, but like all analytical tools, it requires careful application to real situations.…”

Section: Introductionmentioning

confidence: 99%

Pitfalls to avoid in nonlinear perturbation analysis of structured population models

McElderry

Gaoue

2022

Population Ecology

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Despite the ubiquity of nonlinear functional relationships in nature we tend to characterize mechanisms in science using more tractable linear functions. In demographic modeling, transfer function analysis is used to calculate the nonlinear response of population growth rate to a theoretical perturbation of one or more matrix elements. This elegant approach is not yet popular in ecology. Inconveniently, using transfer function without care can produce erroneous results without warning. We used a large matrix projection model database to explore the potential pitfalls to be avoided in using transfer function analysis. We asked a fundamental population control question, what matrix element perturbation would be needed to reach a minimum goal of replacement population growth? We then tracked instances in which transfer function yields erroneous output and explored these cases in detail to measure how frequently it occurs. We developed a phylogenetically-corrected mixed effects logistic regression model in a Bayesian framework to test the effect of species traits and the identity of matrix elements on the probability that transfer function yields errors. We found in 16% of cases the transfer function

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Potential of coffee tourism for rural development in Ethiopia: a sustainable livelihood approach

Woyesa

Kumar

2020

Environ Dev Sustain

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Impact of different shade coffee management scenarios, on a population of Oncidium poikilostalix (Orchidaceae), in Soconusco, Chiapas, Mexico

Cited by 9 publications

References 32 publications

Sensitivity analysis on the declining population in Japan: Effects of prefecture-specific fertility and interregional migration

Sensitivity analysis on the declining population in Japan: Effects of prefecture-specific fertility and interregional migration

Pitfalls to avoid in nonlinear perturbation analysis of structured population models

Potential of coffee tourism for rural development in Ethiopia: a sustainable livelihood approach

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