دانلود رایگان مقاله لاتین نمونه برداری در شبکه پراکندگی دانه از سایت الزویر
عنوان فارسی مقاله:
تمامیت نمونه برداری در شبکه های پراکندگی دانه: هنگامی که بسنده کردن کافی است
عنوان انگلیسی مقاله:
Sampling completeness in seed dispersal networks: When enough is enough
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
The study of community-wide species interaction networks experienced a tremendous growth in recent years and proved a powerful tool to explore many processes in ecology, being particularly valuable in disentangling the relationships between the structure and function of nature’s “entangled bank” (Heleno et al. 2014; Olesen, Dupont, Hagen, Rasmussen, & Trøjelsgaard 2012; Darwin 1859). The use of ecological networks deepened our understanding of important conservation issues such as environmental degradation (e.g. Traveset et al. 2013; Tylianakis, Tscharntke, & Lewis 2007) and ecologicalrestoration (e.g. Heleno,Lacerda, Ramos, & Memmott 2010). Seed dispersal is one of the research areas where ecological networks attracted greatest interest (e.g. Heleno, Olesen, Nogales, Vargas, & Traveset 2013; Carlo & Yang 2011; Donatti et al. 2011; Mello et al. 2011). The dispersal of seeds away from the mother plant is a key process, allowing plants to avoid competition, find suitable conditions for germination, and expand their distribution range (Traveset, Heleno, & Nogales 2014). Due to their high mobility, frugivorous birds are the main seed dispersers in most ecosystems (Herrera 1984; Traveset et al. 2014). Avian seed dispersal data can be collected by: (1) recording fruit consumption by birds on focal plants (Olesen et al. 2011), (2) identifying entire seeds in the droppings of mist-netted birds(Heleno et al. 2013), and (3) identifying seeds in droppings collected in the field and identifying the disperser species with molecular techniques (González-Varo, Arroyo, & Jordano 2014). Most network structure descriptors are affected by sampling effort to some degree (Blüthgen 2010; Blüthgen, Fründ, Vázquez, & Menzel 2008; Rivera-Hutinel, Bustamante, Marín, & Medel 2012), with qualitative indices being more sensitive to sample size than quantitative analogues (Banasek-Richter, Cattin, & Bersier 2004). Specifically, poor sampling underestimates the real diversity of links, truncating estimated trophic breath and leading to a biased network structure (Blüthgen et al. 2008). On the other hand, as implementing such a holistic approach is inherently highly labour-intensive, it is important to know when further effort will not significantly increase the accuracy of the community description, thus avoiding unnecessary work load (Hegland, Dunne, Nielsen, & Memmott 2010). This effort is of utmost importance to allow meaningful cross-study comparisons (Heleno et al. 2014). Richness estimators based on species and link accumulation curves are a powerful way to evaluate sampling completeness(Chacoff et al. 2012; Olito & Fox 2015;RiveraHutinel et al. 2012), where the number of missing species is estimated as those needed to reach a theoretical asymptote (Chacoff et al. 2012). Although some statistical methods have been suggested to ease the problem (e.g. Bartomeus 2013), there are no satisfactory solutions for poor sampling, and the sampling effort needed to build comprehensive seed dispersal networksfrom which theoretical and applied conclusions can be drawn has not yet been evaluated. In this study we aim to evaluate (1) the effect of sampling effort on the completeness ofseed dispersal networks based on the analysis of droppings from mist-netted birds, and (2) the sampling effort needed to build high quality seed dispersal networks so that reliable network descriptors can be calculated.
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کلمات کلیدی:
Effects of sampling completeness on the structure of plant–pollinator ... onlinelibrary.wiley.com/doi/10.1890/11-1803.1/abstract by A Rivera-Hutinel - 2012 - Cited by 39 - Related articles Jul 1, 2012 - In this study we examined how variation in sampling completeness influences the estimation of six network metrics frequently used in the ... Evaluating sampling completeness in a desert plant–pollinator ... onlinelibrary.wiley.com/doi/10.1111/j.1365-2656.2011.01883.x/abstract by NP Chacoff - 2012 - Cited by 95 - Related articles Aug 4, 2011 - Summary. 1. The study of plant–pollinator interactions in a network context is receiving increasing attention. This approach has helped to ... Sampling completeness in seed dispersal networks: When ... - INFONA https://www.infona.pl/.../bwmeta1.element.elsevier-f8f4d86c-87af-... Translate this page by JM Costa - 2016 - Cited by 6 - Related articles We retrieved seeds from the droppings of 936 mist-netted birds captured during five days in seven sites in Portugal and estimated sampling completeness as the ... Sampling completeness in seed dispersal networks ... - PubAg-Article https://pubag.nal.usda.gov/catalog/5270642 by JM Costa - 2016 - Cited by 6 - Related articles Abstract. Ecological networks are an increasingly popular tool to explore community assembly rules and frame practical conservation issues. However, most ... Frugivory and seed dispersal: ecological and evolutionary aspects https://books.google.com/books?isbn=9401117497 T.H. Fleming, Alejandro Estrada - 2012 - Science The proportion of visits made by a species and the proportion of total seeds ... for estimating the degree of completeness of sampling (P. Jordano, pers. comm.) ... GitHub - pedroj/MS_Network-Sampling: Sampling networks of ... https://github.com/pedroj/MS_Network-Sampling Contribute to MS_Network-Sampling development by creating an account on GitHub. ... This is a primer on assessing the completeness of sampling for ecological ... plants and the mutualistic animal frugivores that disperse their seeds.
