scholarly journals Richness of Wild Bees (Hymenoptera: Apidae) in a Forest Remnant in a Transition Region of Eastern Amazonia

2019 ◽  
Vol 2019 ◽  
pp. 1-11
Author(s):  
Luciano André Chaves Ferreira ◽  
Denilson Costa Martins ◽  
Márcia Maria Corrêa Rêgo ◽  
Patrícia Maia Correia de Albuquerque
Keyword(s):  
Species Richness ◽  
Biological Diversity ◽  
The State ◽  
Species Accumulation Curve ◽  
Wild Bees ◽  
Accumulation Curve ◽  
Baited Traps ◽  
Forest Remnant ◽  
Three New Species ◽  
Amazonian Region

Eastern Amazonia is an area with great biological diversity that has suffered rapid deforestation and forest fragmentation over the years. Because of the scarcity of data on the fauna and flora, the northwest of the state of Maranhão has become a priority area for studies that seek to gain a better understanding of bee fauna. Between August 2013 and December 2014, in collections at two-month intervals, a total of 1047 bees belonging to 70 species were collected using two methods (an insect net and scent-baited traps). Apinae was the most abundant subfamily and had the greatest species richness (63 species and 1039 individuals); the most notable tribes in this subfamily were Meliponini (20 species and 445 individuals) and Euglossini (24 species and 452 individuals). In all, 62.8% of the total richness was sampled with an insect net and 34.2% with bait traps. Bees were present in every collection month, and August and December were the months with the greatest richness and abundance, respectively. Although the species accumulation curve did not stabilize, the results were positive as three new species were recorded for the Maranhão state: Bombus transversalis (Olivier, 1789); Xylocopa suspecta Moure and Camargo, 1988; and Xylocopa macrops Lepeletier, 1841, and eleven for the Amazonian region of the state.

Estimating the snake species richness of the Santubong Peninsula (Borneo): a computer-simulation

2012 ◽  
Vol 33 (3-4) ◽  
pp. 521-525
Author(s):  
Johan van Rooijen
Keyword(s):  
Species Richness ◽  
Estimation Procedure ◽  
Weibull Model ◽  
Small Scale ◽  
Species Accumulation Curve ◽  
Wide Confidence Interval ◽  
Snake Species ◽  
Accumulation Curve ◽  
Species Accumulation ◽  
Accuracy And Precision

The snake species richness of the Santubong Peninsula, Sarawak, Borneo, has been estimated previously by fitting a Weibull model to the rarefied species accumulation curve. In the present study, the estimation procedure was simulated in order to shed more light on its validity, i.e. its accuracy and precision. First, the estimate was updated on the basis of an additional, small-scale, survey carried out in 2011. Subsequently, survey-data were used to construct a simulation database. Twenty samples were randomly drawn from this database. Each sample was transformed into a rarefied species accumulation curve to which a Weibull model was fitted. For comparison, various related models were fitted as well. All applied models resulted in a downwardly biased estimate. The Weibull model performed best, providing the estimate of species richness with the smallest bias and thus highest accuracy. As for the precision of the estimate, a rather wide confidence interval was established.

scholarly journals Mammal species richness and new records in protected natural areas of the northern part of the metropolitan area of the Valley of México

Therya ◽  
2021 ◽  
Vol 12 (3) ◽  
pp. 537-551
Author(s):  
Yolanda Hortelano-Moncada ◽  
Asela Samari Barragán-Saldaña ◽  
Jesús Fernández-Reyes ◽  
Fernando Alfredo Cervantes-Reza ◽  
Leonardo Barragán Guerrero ◽  
...  
Keyword(s):  
Species Richness ◽  
Metropolitan Area ◽  
Species Accumulation Curve ◽  
Natural Areas ◽  
Natural Area ◽  
Mammal Species ◽  
Accumulation Curve ◽  
Species Accumulation ◽  
Protected Natural Areas ◽  
Leptonycteris Yerbabuenae

Sierra de Guadalupe is the only mountain range in the northern part of the Valley of Mexico metropolitan area.  The accelerated urban expansion over the past decades has turned Sierra de Guadalupe into an isolated natural area immersed within the urban matrix.  This study aimed to gather a documented inventory of the mammals of Sierra de Guadalupe as such information is useful to improve the management, restoration, and conservation of this important natural area of the basin of Mexico.  Mammal collection records were extensively surveyed in the literature, collection databases, web pages, and scientific collections; field surveys were also conducted.  A taxonomic list of the mammal species and their conservation status in the four Protected Natural Areas of Sierra de Guadalupe was compiled.  A species-accumulation curve was constructed using the Chao 1 model and a map showing the distribution of collection records was produced.  This work reveals that the mammals of Sierra de Guadalupe include 29 species, 23 genera, 15 families, and six orders.  Six species are endemic to Mexico; two of them, Choeronycteris mexicana and Cratogeomys fumosus, are listed as threatened and one, Leptonycteris yerbabuenae, as under special protection.  Collection records were gathered from 62 different localities.  The largest number of species records and collections were made between 2009 and 2020.  The species-accumulation curve projects a total of 36 mammal species.  This is the first documented inventory ever compiled of the wild mammals of Sierra de Guadalupe.  The species richness observed in this area is remarkable, considering its extension and environmental stressors; in addition, it harbors species endemic to Mexico, some of which are threatened.  This is the first time that the species Sorex saussurei, Choeronycteris mexicana, Leptonycteris yerbabuenae, Cratogeomys merriami, Neotomodon alstoni, and Peromyscus melanophryshave been recorded in this area.  The species-accumulation curve indicates that our inventory provides a good representation of the local species assemblage.  This information can support the formulation of action plans for the conservation and restoration of the biological diversity of these important Protected Natural Areas and the last significant natural area remaining in the northern part of the Valley of Mexico Metropolitan Area.

scholarly journals EVALUACIÓN DE LA FRECUENCIA DE MUESTREO DEL PROGRAMA DE MONITOREO DE FLORA MARINA EN LA CENTRAL NUCLEAR ALMIRANTE ÁLVARO ALBERTO, RIO DE JANEIRO, BRASIL

2016 ◽  
Vol 45 (2) ◽  
Author(s):  
João Pedro Garcia Araujo ◽  
Alexandre Hiroyuki Kubota
Keyword(s):  
Species Richness ◽  
Environmental Monitoring ◽  
Brown Algae ◽  
Cooling System ◽  
Sampling Site ◽  
Monitoring Program ◽  
Sampling Frequency ◽  
Species Accumulation Curve ◽  
Accumulation Curve ◽  
Species Accumulation

Almirante Álvaro Alberto Nuclear Complex (CNAAA) uses seawater in the cooling system of its nuclear power plants. This water returns to the environment with a 2 °C to 8 °C temperature increase. To understand the effects of this thermal effluent, there is a large environmental monitoring program that analyses physicochemical and biological parameters, including a survey of brown algae at sampling site 32B, the nearest to the thermal discharge. This work compares monthly and seasonal variations of the specific composition of brown algae to evaluate the feasibility of changing the sampling frequency of the CNAAA monitoring program. The evaluation is performed by following two approaches: a species accumulation curve and comparisons between species richness values obtained from monthly and seasonal sampling. Species accumulation curve structure indicates that brown algae diversity at site 32B is well covered. Species richness measurements indicate that there are no significant differences between monthly and seasonal samples. These results suggest that it is possible to reduce brown algae sampling frequency for the CNAAA monitoring program without significant data loss. Furthermore, it would allow the company to cut costs, thus improving the distribution of resources within its environmental monitoring program.

scholarly journals Estimating Species Richness of Tropical Bird Communities From Rapid Assessment Data

The Auk ◽  
2002 ◽  
Vol 119 (3) ◽  
pp. 749-769 ◽  
Author(s):  
Sebastian K. Herzog ◽  
Michael Kessler ◽  
Thomas M. Cahill
Keyword(s):  
Species Richness ◽  
Rapid Assessment ◽  
Bird Communities ◽  
Data Sets ◽  
Species Accumulation Curve ◽  
Species List ◽  
Accumulation Curve ◽  
Species Accumulation ◽  
Accumulation Curves ◽  
Tropical Bird

Abstract Rapid assessment surveys of tropical bird communities are increasingly used to estimate species richness and to determine conservation priorities, but results of different studies are often not comparable due to the lack of standardization. On the basis of computer simulations and six years of field testing, we evaluated the recently proposed “20-species-list” survey method and statistical estimators for assessing species richness of tropical bird communities. This method generates a species-accumulation curve by subdividing consecutive observations of birds into lists of 20 species, thus relating cumulative species richness to the number of observations rather than time or space and thereby accounting for moderate differences in observer qualification and field conditions. Species accumulation curves from computer-simulated communities and two empirical data sets from Bolivia were analyzed with nine species richness estimators to evaluate estimator accuracy with respect to variations in species-list size, sample size, species-pool size, and community structure. For empirical and most simulated data sets, the MMMEAN estimator performed best, but it was more sensitive to differences in community structure than most other estimators. The CHAO 2 estimator, which was recommended by previous studies, performed reasonably well but was considerably more sensitive to sample size than MMMEAN. The bootstrap and first- and second-order jackknife estimators performed poorly. We recommend using MMMEAN or, when standard deviations of richness estimates are indispensable, CHAO 2 with 10-species lists for estimating species richness of tropical bird communities and propose a set of standard survey rules. Careful examination of estimator accumulation curves is required, however, and a technique based on the ratio between estimator and species accumulation curve is suggested to control for the confounding effects of sampling effort. Overall, the species-list method combined with statistical richness estimation is doubtlessly much more standardized and valuable than simple comparisons of one-dimensional locality lists and represents a promising tool for conservation assessment and the study of avian diversity patterns in the tropics.

scholarly journals An approach based on the total‐species accumulation curve and higher taxon richness to estimate realistic upper limits in regional species richness

2017 ◽  
Vol 8 (1) ◽  
pp. 405-415 ◽  
Author(s):  
Stanislao Bevilacqua ◽  
Karl Inne Ugland ◽  
Adriana Plicanti ◽  
Danilo Scuderi ◽  
Antonio Terlizzi
Keyword(s):  
Species Richness ◽  
Taxon Richness ◽  
Species Accumulation Curve ◽  
Accumulation Curve ◽  
Species Accumulation ◽  
Upper Limits ◽  
Total Species

scholarly journals The species-accumulation curve and estimation of species richness

2003 ◽  
Vol 72 (5) ◽  
pp. 888-897 ◽  
Author(s):  
Karl I. Ugland ◽  
John S. Gray ◽  
Kari E. Ellingsen
Keyword(s):  
Species Richness ◽  
Species Accumulation Curve ◽  
Accumulation Curve ◽  
Species Accumulation

La valorisation des prestations non-bois: particularités genevoises (essai) | Commercialization of non-wood forest services: the case of Geneva (essay)

2009 ◽  
Vol 160 (8) ◽  
pp. 232-234
Author(s):  
Patrik Fouvy
Keyword(s):  
Forest Regeneration ◽  
Biological Diversity ◽  
The State ◽  
Forest Land ◽  
Private Forests ◽  
The Public ◽  
Public Body ◽  
Provision Of Services ◽  
History Of ◽  
Near Future

The history of the forests in canton Geneva, having led to these being disconnected from productive functions, provides a symptomatic demonstration that the services provided by the forest eco-system are common goods. Having no hope of financial returns in the near future and faced with increasing social demands, the state has invested in the purchase of forest land, financed projects for forest regeneration and improvement of biological diversity and developed infrastructures for visitors. In doing this the state as a public body takes on the provision of services in the public interest. But the further funding for this and for expenses for the private forests, which must be taken into account, are not secured for the future.

The centipede genus Otostigmus Porat in Brazil: Description of three new species from the Atlantic Forest; a summary and an identification key to the Brazilian species of this genus (Chilopoda, Scolopendromorpha, Scolopendridae, Otostigminae)

Zootaxa ◽  
2012 ◽  
Vol 3280 (1) ◽  
pp. 1 ◽  
Author(s):  
AMAZONAS CHAGAS-JÚNIOR
Keyword(s):  
New Species ◽  
Atlantic Forest ◽  
The State ◽  
Junior Synonym ◽  
Identification Key ◽  
Nominal Species ◽  
Brazilian Atlantic Forest ◽  
Three New Species ◽  
First Time ◽  
New Distribution

Three new species of Otostigmus Porat, 1876 from Brazilian Atlantic Forest are described. Otostigmus beckeri sp. n. andO. lanceolatus sp. n. are described from the state of Bahia and O. giupponii sp. n. from the state of Espírito Santo. InBrazil, the otostigmine scolopendrid genus Otostigmus comprises 22 species. A summary of Brazilian Otostigmus speciesis presented with new distribution records, taxonomic remarks when appropriate and an identification key. Otostigmus sul-catus Meinert, 1886 is recorded for the first time from Brazil; the Andean Otostigmus silvestrii Kraepelin 1903, previouslyrecorded from Brazil, is here considered not to be present in this country. Eight nominal species are regarded here as newsynonyms. Five of them—Otostigmus pradoi Bücherl, 1939, O. longistigma Bücherl, 1939, O. longipes Bücherl, 1939,O. langei Bücherl, 1946 and O. dentifusus Bücherl, 1946—are based on females of O. tibialis Brölemann, 1902. O. latipesBücherl, 1954 is conspecific with and is considered a junior synonym of O. sulcatus Meinert, 1886; O. limbatus diminutusBücherl, 1946 is a junior synonym of O. limbatus Meinert, 1886 and O. fossulatus Attems, 1928 is a junior synonym of O. goeldii Brölemann, 1898. A lectotype is designated for O. goeldii.

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