scholarly journals Estrutura e composição do estrato herbáceo em um remanescente de Floresta Semidecidual Submontana no Nordeste do Brasil

2013 ◽  
Vol 13 ◽  
Author(s):  
Jéssica Lira Viana ◽  
Maria Regina De Vasconcellos Barbosa
Keyword(s):  
Species Diversity ◽  
Geographic Distribution ◽  
Rare Species ◽  
Abundant Species ◽  
Shannon Index ◽  
Fragmented Landscape ◽  
General Survey ◽  
Natural Heritage ◽  
The Family ◽  
Phytosociological Study

The vegetation of a Submontane Semidecidual Seasonal Forest in the Private Natural Heritage Reserve Pedra D’Anta Farm, in Pernambuco State, Brazil, was sampled with the following objectives: 1- to inventory the terrestrial herbs; 2- to characterize the structure of the herbaceous synusiae; 3- to characterize the geographic distribution of terrestrial herbs; and 4- to characterize the heliophyte and sciophyte herbs. Arbitrary walks were performed for a general survey of species, and 20 transects were used to sample the structure in 50 plots of 1 m² each. Frequencies and densities were calculated, with diversity measured by the indicator of specific richness (S) and the Shannon index (H'). A total of 107 species in 75 genera and 39 families were collected, with 25 of these species included in the phytosociological study. Poaceae was the family with the highest number of species in both floristic and phytosociological studies. The species Parodiolyra micrantha and Oplismenus hirtellus were the most frequent and abundant. Species diversity (H') was 2.85 nats. The herbaceous layer was found to be rich, having a composition consisting mostly of widely dispersed species, with a prevalence of herbal hemicryptophytes. Although the study area presents a fragmented landscape and occurrence of many ruderal species, it represents a refuge for rare species like Psilochilus modestus and Streptochaeta spicata.

scholarly journals Ocean currents promote rare species diversity in protists

2020 ◽  
Vol 6 (29) ◽  
pp. eaaz9037
Author(s):  
Paula Villa Martín ◽  
Aleš Buček ◽  
Thomas Bourguignon ◽  
Simone Pigolotti
Keyword(s):  
Species Diversity ◽  
Power Law ◽  
Rare Species ◽  
Species Abundance ◽  
Ecological Factors ◽  
Abundant Species ◽  
Chaotic Advection ◽  
Power Law Decay ◽  
Aquatic Microbes ◽  
Oceanic Currents

Oceans host communities of plankton composed of relatively few abundant species and many rare species. The number of rare protist species in these communities, as estimated in metagenomic studies, decays as a steep power law of their abundance. The ecological factors at the origin of this pattern remain elusive. We propose that chaotic advection by oceanic currents affects biodiversity patterns of rare species. To test this hypothesis, we introduce a spatially explicit coalescence model that reconstructs the species diversity of a sample of water. Our model predicts, in the presence of chaotic advection, a steeper power law decay of the species abundance distribution and a steeper increase of the number of observed species with sample size. A comparison of metagenomic studies of planktonic protist communities in oceans and in lakes quantitatively confirms our prediction. Our results support that oceanic currents positively affect the diversity of rare aquatic microbes.

scholarly journals Species diversity and composition of mangroves in Tacloban City, Philippines

2019 ◽  
pp. 67-75
Author(s):  
Teofanes Patindol ◽  
Eulito Casas
Keyword(s):  
Species Diversity ◽  
Stand Structure ◽  
Abundant Species ◽  
Shannon Index ◽  
Stem Density ◽  
Average Height ◽  
Mangrove Forests ◽  
Bruguiera Gymnorrhiza ◽  
Canopy Layer ◽  
Mangrove Species

This study reflects the present status of Tacloban City mangrove vegetation and would be useful for mangrove restoration program. Surveys of mangrove forests in Tacloban City were conducted from October to November 2017 in 12 selected sites. Quadrat method was used to assess the species composition and stand structure of the canopy layer, representing seaward, middle and landward zones. The mangrove forests in Tacloban City contain 23 mangrove species belonging to 12 families and 15 genera. Rhizophoraceae and Acanthaceae are the most dominating families. As per IUCN report, among the 23 species, 4 were recognized as threatened. These include the Endangered Camptostemon philippinensis, the Vulnerable Avicennia rumpiana and the Near Threatened Aegiceras floridum and Ceriops decandra. Rhizophora Apiculata is the most abundant species, followed by Sonneratia alba. Other abundant species are Avicennia officinalis, Avicennia marina and Rhizophora mucronata. The least abundant are Bruguiera gymnorrhiza, Camptostemon philippinensis and Xylocarpus granatum. The canopy layer is composed of small-sized trees with an average tree density of 1,678 per ha and stem density of 3,133 per ha. The average height and diameter are 6.15m and 8.95cm, respectively. Mangrove diversity is generally low. Shannon index of diversity value ranges from 0.762 to 1.132, with an average value of 0.914. Understory is characterized by few species of regenerants, low density and low species diversity.

scholarly journals The response of bats (Mammalia: Chiroptera) to an incidental fire on a gallery forest at a Neotropical savanna

2015 ◽  
Vol 15 (4) ◽  
Author(s):  
Hernani F. M. de Oliveira ◽  
Ludmilla M.S. Aguiar
Keyword(s):  
Species Diversity ◽  
Forest Canopy ◽  
Abundant Species ◽  
Shannon Index ◽  
Gallery Forest ◽  
Chi Square ◽  
Natural Event ◽  
Chi Square Test ◽  
Distrito Federal ◽  
Over Time

Fire is a common and natural event in Cerrado that can influence the composition of trees and mammals and change the entire conditions of the environment. This study was developed in a gallery forest of Distrito Federal - Brazil. Bat samplings were conducted for a total of six nights after a fire that happened on the gallery forest. Three samplings were conducted: one day, three months and seven months after fire. A total of nine mist nets (12 m x 3 m) were opened from 7pm to 1am. Captured bats were measured and identified to species. Shannon index measured the species diversity of bats in the gallery forest over time. A rarefaction curve was made to assess the estimated bat richness in each of the samplings and a chi-square test was used to check whether there have been changes on bat abundances over time. A total of 46 bats from 8 different species and one family were captured. The most abundant species was Sturnira lilium. Species diversity and abundance increased over time and there was a gradual accumulation of species and specimens indicating that the succession and recovery of the forest occurs due to a temporal addition of specimens and species in the assemblage and not as punctual occurrences. Probably, this recovery pattern reflects a gradual increase in the availability of resources and recovery of the forest canopy, progressively offering more shelter and food for the bat assemblage.

scholarly journals Ocean currents promote rare species diversity in protists

2020 ◽  
Author(s):  
Paula Villa Martín ◽  
Ales Bucek ◽  
Tom Bourguignon ◽  
Simone Pigolotti
Keyword(s):  
Species Diversity ◽  
Power Law ◽  
Rare Species ◽  
Species Abundance ◽  
Ecological Factors ◽  
Abundant Species ◽  
Coalescence Model ◽  
Power Law Decay ◽  
Aquatic Microbes ◽  
Oceanic Currents

Oceans host communities of plankton composed of relatively few abundant species and many rare species. The number of rare protists species in these communities, as estimated in metagenomic studies, decays as a steep power law of their abundance. The ecological factors at the origin of this pattern remain elusive. We propose that oceanic currents affect biodiversity patterns of rare species. To test this hypothesis, we introduce a spatially-explicit coalescence model able to reconstruct the species diversity in a sample of water. Our model predicts, in the presence of oceanic currents, a steeper power law decay of the species abundance distribution and a steeper increase of the number of observed species with sample size. A comparison of two metagenomic studies of planktonic protist communities in oceans and in lakes quantitatively confirms our prediction. Our results support that oceanic currents positively impact the diversity of rare aquatic microbes.

New records of some rare species in the family Hyaloscyphaceae (Ascomycota, Helotiales) from Central Russia

2013 ◽  
Vol 47 ◽  
pp. 135-142
Author(s):  
E. S. Popov
Keyword(s):  
Rare Species ◽  
New Records ◽  
Moscow Region ◽  
North Caucasus ◽  
Central Russia ◽  
The Family ◽  
First Time

Three rare species of discomycetes in the family Hyaloscyphaceae are reported from Central Russia (Oryol and Bryansk Regions). Proliferodiscus tricolor is recorded for the first time in Russia. Comments are made on Aeruginoscyphus sericeus and Eriopezia caesia previously reported only from Moscow Region and North Caucasus respectively.

scholarly journals Phylogenetic paleoecology: macroecology within an evolutionary framework

Paleobiology ◽  
2021 ◽  
Vol 47 (2) ◽  
pp. 171-177
Author(s):  
James C. Lamsdell ◽  
Curtis R. Congreve
Keyword(s):  
Species Diversity ◽  
Spatial Variation ◽  
Geographic Distribution ◽  
Evolutionary Biology ◽  
Phylogenetic Signal ◽  
Evolutionary Rates ◽  
The Other ◽  
Ecological Data ◽  
Temporal And Spatial Variation ◽  
Temporal And Spatial

The burgeoning field of phylogenetic paleoecology (Lamsdell et al. 2017) represents a synthesis of the related but differently focused fields of macroecology (Brown 1995) and macroevolution (Stanley 1975). Through a combination of the data and methods of both disciplines, phylogenetic paleoecology leverages phylogenetic theory and quantitative paleoecology to explain the temporal and spatial variation in species diversity, distribution, and disparity. Phylogenetic paleoecology is ideally situated to elucidate many fundamental issues in evolutionary biology, including the generation of new phenotypes and occupation of previously unexploited environments; the nature of relationships among character change, ecology, and evolutionary rates; determinants of the geographic distribution of species and clades; and the underlying phylogenetic signal of ecological selectivity in extinctions and radiations. This is because phylogenetic paleoecology explicitly recognizes and incorporates the quasi-independent nature of evolutionary and ecological data as expressed in the dual biological hierarchies (Eldredge and Salthe 1984; Congreve et al. 2018; Fig. 1), incorporating both as covarying factors rather than focusing on one and treating the other as error within the dataset.

Carabidae (Coleoptera) in Nova Scotia, Canada wild blueberry fields: prospects for biological control

2012 ◽  
Vol 144 (6) ◽  
pp. 779-791 ◽  
Author(s):  
G.C. Cutler ◽  
J.M. Renkema ◽  
C.G. Majka ◽  
J.M. Sproule
Keyword(s):  
Biological Control ◽  
Nova Scotia ◽  
Species Diversity ◽  
Insect Pests ◽  
Abundant Species ◽  
Conservation Biological Control ◽  
Carabid Beetles ◽  
Eastern Canada ◽  
Wild Blueberries ◽  
Wild Blueberry

AbstractThe Carabidae (Coleoptera) are a diverse family of beetles with almost 300 species identified in Nova Scotia, Canada. Carabid beetle communities have been studied in several agricultural systems, but not wild blueberries, an important crop in eastern Canada. In the interest of potentially developing conservation biological control programs in wild blueberry, we collected Carabidae in crop (fruit-bearing) and sprout (vegetative) blueberry fields in Nova Scotia in order to assess species diversity and abundance over space and time. Over 3200 specimens were collected, representing 51 species. A large portion of collected specimens (39%) were nonnative, and the most abundant species were generally predacious and synanthropic. Species diversity tended to be higher near forest edges than further into fields, but not for all abundant species. Several of the most prominent predators showed significant differences in preference of crop versus sprout fields, distribution throughout fields, and seasonable abundance. These findings have implications for conservation biological control efforts with carabid beetles against several insect pests in wild blueberry.

First data on plasmodial slime moulds (Myxomycetes = Myxogastrea) of Rdeysky Nature Reserve (Novgorod Region, Russia)

2021 ◽  
Vol 55 (2) ◽  
pp. 361-377
Author(s):  
N. I. Borzov ◽  
F. M. Bortnikov ◽  
A. V. Matveev ◽  
V. I. Gmoshinskiy
Keyword(s):  
Species Diversity ◽  
Rare Species ◽  
Nature Reserve ◽  
Common Species ◽  
Slime Moulds ◽  
State Nature Reserve ◽  
Plasmodial Slime Moulds ◽  
State Nature

The results of the first study of the species diversity of myxomycetes of the Rdeysky State Nature Reserve are presented. The 201 field specimens of sporophores belonging to 56 morphospecies from 27 genera, ten families, and six orders were collected from September 30 to October 5, 2020. Fifty-two species of these were new for the Novgorod Region. The most common species at the reserve were Arcyria affinis, Hemitrichia calyculata, Lycogala epidendrum, Metatrichia vesparia, Physarum album, Trichia decipiens, and T. varia. Additionally, detailed morphological descriptions of two rare species Amaurochaete trechispora and Trichia crateriformis are given.

scholarly journals Bat flies (Diptera: Streblidae) ectoparasites of bats at an Atlantic Rainforest site in northeastern Brazil

2013 ◽  
Vol 13 (2) ◽  
pp. 242-246 ◽  
Author(s):  
Fábio Angelo Melo Soares ◽  
Gustavo Graciolli ◽  
Daniel Máximo Corrêa Alcântara ◽  
Carlos Eduardo Borges Pinto Ribeiro ◽  
Gustavo Corrêa Valença ◽  
...  
Keyword(s):  
Northeastern Brazil ◽  
Atlantic Rainforest ◽  
Mato Grosso ◽  
Natural Heritage ◽  
Bat Flies ◽  
Brazilian State ◽  
The Family ◽  
Reference Collection ◽  
First Time ◽  
Mato Grosso Do Sul

Bat flies were surveyed between March, 2007 and February, 2008, in the Carnijó Private Natural Heritage Reserve (08° 07′ S and 35° 05′ W), an area of Atlantic Rainforest in the municipality of Moreno, in the Brazilian state of Pernambuco. Bats were captured biweekly using mist nets set during six hours each night. The ectoparasites were collected with tweezers and/or a brush wet in ethanol and stored in 70% ethanol. The specimens are deposited in the zoological reference collection of the Federal University of Mato Grosso do Sul. Sixteen species of streblid bat flies were collected from 10 bat species of the family Phyllostomidae. Thirteen of the these streblid species were recorded for the first time in Pernambuco.

scholarly journals Species of Geotrupidae (Coleoptera: Scarabaeoidea) in Aquidauana, Mato Grosso do Sul, Brazil

2013 ◽  
Vol 13 (1) ◽  
pp. 349-352
Author(s):  
Sérgio Roberto Rodrigues ◽  
Anderson Puker
Keyword(s):  
Organic Matter ◽  
Light Trap ◽  
Abundant Species ◽  
Ecological Role ◽  
Mato Grosso ◽  
The Family ◽  
Total Capture ◽  
First Time ◽  
Mato Grosso Do Sul

Coleoptera of the family Geotrupidae play an important ecological role in the decomposition of animal and plant organic matter. In Brazil there is little information on the diversity and distribution of this group, thus, this work had a purpose to study Geotrupidae species, occurring in Aquidauana, MS. A survey for geotrupids was conducted in Aquidauana, Mato Grosso do Sul, Brazil. Beetles were captured using a light trap over a period of two years, from January 2006 to December 2007. A total of 907 specimens were collected and identified to eight species. From the subfamily Bolboceratinae, the species identified were Bolbapium minutum (Luederwaldt, 1929) and Pereirabolbus castaneus (Klug, 1845). In the subfamily Athyreinae the species identified were Athyreus bilobus Howden & Martínez, 1978, Parathyreus aff. bahiae, Neoathyreus aff. julietae, N. sexdentatus Laporte, 1840, N. centromaculatus (Felsche, 1909) and N. goyasensis (Boucomont, 1902). Four species (A. bilobus, N. centromaculatus, N. goyasensis and P. castaneus) are reported for the first time in Aquidauana, MS, Brazil. The most abundant species, representing 85.9% of the total capture, was B. minutum. The greatest numbers of specimens was caught from October to December of both years of the study.

Sign in / Sign up

Export Citation Format

Share Document