scholarly journals The endophytic community of Dactylis glomerata

2007 ◽  
Vol 13 ◽  
pp. 69-73
Author(s):  
Sánchez Márquez ◽  
G.F. Bills ◽  
I. Zabalgogeazcoa
Keyword(s):  
Fungal Endophytes ◽  
Dactylis Glomerata ◽  
Molecular Methods ◽  
Sampling Effort ◽  
Species Accumulation Curves ◽  
Species Accumulation ◽  
Unknown Species ◽  
Ecological Roles ◽  
Accumulation Curves ◽  
Endophytic Community

Morphological and molecular methods were used to identify the endophytic mycobiota of the grass Dactylis glomerata. Fungal endophytes belonging to 109 different species were isolated from asymptomatic plants sampled in different ecosystems in Spain. Species accumulation curves showed that most species commonly infecting this grass have been identified, but the number of singleton species occasionally infecting the plants is likely to increase with more sampling effort. A large endophytic assemblage consisting of fungi with diverse ecological roles, and potentially unknown species was found in a small number of plants. Keywords: endophytes, Dactylis glomerata, diversity, abundance

scholarly journals Can Observation Skills of Citizen Scientists Be Estimated Using Species Accumulation Curves?

PLoS ONE ◽  
2015 ◽  
Vol 10 (10) ◽  
pp. e0139600 ◽  
Author(s):  
Steve Kelling ◽  
Alison Johnston ◽  
Wesley M. Hochachka ◽  
Marshall Iliff ◽  
Daniel Fink ◽  
...  
Keyword(s):  
Species Accumulation Curves ◽  
Species Accumulation ◽  
Accumulation Curves

scholarly journals Edge effects and landscape matrix use by a small mammal community in fragments of semideciduous submontane forest in Mato Grosso, Brazil

2008 ◽  
Vol 68 (4) ◽  
pp. 703-710 ◽  
Author(s):  
M. Santos-Filho ◽  
DJ. da Silva ◽  
TM. Sanaiotti
Keyword(s):  
Species Richness ◽  
Small Mammal ◽  
Species Number ◽  
Sampling Effort ◽  
Similar Species ◽  
Species Accumulation Curves ◽  
Mammal Species ◽  
Mato Grosso ◽  
Species Accumulation ◽  
Species Richness And Abundance

A community of small mammals was studied in seasonal semideciduous submontane forest in the state of Mato Grosso, Brazil. This study evaluated the use of edge and matrix pasture, by different small mammal species. Overall, 31 areas were studied, with a total sampling effort of 33,800 trap x nights. Only seven of the 25 species captured in the study sites were able to use the pasture matrix; we classified these species as generalists. Fourteen species were found to be intermediate in habits, being able to use forest edges. We found only four species habitat specialists, occurring only on transect lines in the interior of the fragment, at least 150 m from the edge. Transects located in the pasture matrix and 50 m from the edge had significantly lower species richness and abundance than transects located in the fragment edge or in the interior of the fragment. All transects located within the fragment had similar species richness and abundance, but transects located 50 m from the edge had slightly lower, but non-significant, species richness than transects located 100 m apart from edges. Rarefaction curves demonstrated that only medium-sized fragments (100 300 ha) reached an asymptote of species accumulation. The other areas require further sampling, or more sampling transect, before species accumulation curves stabilize, due to a continued increase in species number.

scholarly journals Butterflies (Lepidoptera: Hesperioidea and Papilionoidea) of Porto Mauá, Upper Paraná Atlantic Forest Ecoregion, Rio Grande do Sul State, Brazil

2014 ◽  
Vol 14 (2) ◽  
Author(s):  
Sabrina Campos Thiele ◽  
Oscar Milcharek ◽  
Fábio Luis dos Santos ◽  
Lucas Augusto Kaminski
Keyword(s):  
Atlantic Forest ◽  
Deciduous Forest ◽  
Rio Grande ◽  
Sampling Effort ◽  
Rio Grande Do Sul ◽  
Species Accumulation Curves ◽  
Ecological Corridor ◽  
Butterfly Fauna ◽  
Accumulation Curves ◽  
Upper Paraná Atlantic Forest

This paper presents a list of species of butterflies (Lepidoptera: Hesperioidea and Papilionoidea) sampled in Porto Mauá municipality (27°34’S, 28°40’W), Rio Grande do Sul State, Brazil. Sampling was carried out monthly between March 2008 and March 2009. After 204 net-hours of sampling effort, a total of 1,993 individuals from 253 species were recorded. With a single additional expedition, eight new species were added, reaching a total of 261 species recorded in the region of Porto Mauá. These new reports and the species accumulation curves may indicate a much richer fauna. The distribution of richness among butterfly families is compared with other inventories in seasonal semi-deciduous forest areas in the Atlantic Forest. We also discuss the importance of riparian forests of the Uruguay River as an ecological corridor that enables the maintenance of the butterfly fauna on the southern edge of the Upper Paraná Atlantic Forest Ecoregion.

Mutualistic Networks in Time and Space

2013 ◽  
Author(s):  
Jordi Bascompte ◽  
Pedro Jordano
Keyword(s):  
Theoretical Models ◽  
Theoretical Work ◽  
Point Of View ◽  
Sampling Effort ◽  
Time And Space ◽  
Species Accumulation Curves ◽  
High Turnover ◽  
Accumulation Curves ◽  
Mutualistic Networks ◽  
Temporal Dimensions

This chapter reviews the combination of empirical and theoretical work describing the dynamics of mutualistic networks in time and space. It also addresses what components of these networks are time and space invariant. On a daily basis, network assembly is intermediate between preferential and random attachment. In a year-to-year scale, there is a very high turnover in species and interactions across years, and yet the global structure of the network is quite constant. Across space, theoretical models predict that plantanimal interactions increase spatial heterogeneity. The spatial and temporal dimensions are also interesting from a more methodological point of view to assess the effect of sampling effort. Interaction accumulation curves are the equivalent of species accumulation curves used in biodiversity monitoring and can be used to assess the role of sampling effort. But important natural history details explain a fraction of the nonobserved links. Therefore, treating missing interactions as the expected unique result of sampling bias would miss important components of the ecological and (co)evolutionary basis of mutualistic networks.

scholarly journals Predicting unknown species numbers using discovery curves

2007 ◽  
Vol 274 (1618) ◽  
pp. 1651-1658 ◽  
Author(s):  
Daniel P Bebber ◽  
Francis H.C Marriott ◽  
Kevin J Gaston ◽  
Stephen A Harris ◽  
Robert W Scotland
Keyword(s):  
New World ◽  
Statistical Approach ◽  
Species Accumulation Curves ◽  
Species Numbers ◽  
Unknown Species ◽  
Extant Species ◽  
Accumulation Curves ◽  
Species Descriptions ◽  
Total Species ◽  
Global Datasets

A common approach to estimating the total number of extant species in a taxonomic group is to extrapolate from the temporal pattern of known species descriptions. A formal statistical approach to this problem is provided. The approach is applied to a number of global datasets for birds, ants, mosses, lycophytes, monilophytes (ferns and horsetails), gymnosperms and also to New World grasses and UK flowering plants. Overall, our results suggest that unless the inventory of a group is nearly complete, estimating the total number of species is associated with very large margins of error. The strong influence of unpredictable variations in the discovery process on species accumulation curves makes these data unreliable in estimating total species numbers.

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