Priorities for cave fauna conservation in the Iuiú karst landscape, northeastern Brazil: a threatened spot of troglobitic species diversity

2021 ◽  
Vol 30 (5) ◽  
pp. 1433-1455
Author(s):  
Rafael Costa Cardoso ◽  
Rodrigo Lopes Ferreira ◽  
Marconi Souza-Silva
Keyword(s):  
Species Diversity ◽  
Northeastern Brazil ◽  
Karst Landscape ◽  
Cave Fauna

scholarly journals Morphofunctional changes of phytoplankton community during pluvial anomaly in a tropical reservoir

2015 ◽  
Vol 75 (3) ◽  
pp. 628-637 ◽  
Author(s):  
FRA Câmara ◽  
O Rocha ◽  
EKR Pessoa ◽  
S Chellappa ◽  
NT Chellappa
Keyword(s):  
Species Diversity ◽  
Dissolved Oxygen ◽  
Oxygen Content ◽  
Phytoplankton Community ◽  
Diversity Index ◽  
Hydrodynamic Instability ◽  
Electrical Conductance ◽  
Northeastern Brazil ◽  
Tropical Reservoir ◽  
Cyanobacterial Species

AbstractThe present study focuses on the structure and function of phytoplankton community during periods of marked changes in hydrological traits, influenced by an atypical climatic event (La Niña) and its impact on Armando Ribeiro Gonçalves Reservoir of Rio Grande do Norte, situated in the Caatinga biome of northeastern Brazil. The main questions addressed were: What are the effects of environmental factors on the temporal variation of Morphologically Based Functional Group (MBFG) of phytoplankton community? How does the composition of cyanobacterial species shift in relation to high and low trends of phytoplankton diversity? The samples were collected monthly during 2008-2009 and analyzed for pH, temperature, electrical conductivity, dissolved oxygen content and the nutrients, such as, nitrate-nitrogen, ammoniacal nitrogen, total nitrogen and orthophosphate. Phytoplankton samples were collected for both qualitative and quantitative analyses to evaluate species richness index and species diversity index. The data was divided into two distinct hydrodynamic periods of instability and stability. The results demonstrate considerable changes in dissolved oxygen content, water transparency and nitrogen nutrients, which directly influenced the MBFG of phytoplankton community in space and time. The instability of reservoir water was caused by heavy rainfall, which exerts atypical external disturbances. The seasonal variation of MBFG demonstrates a change in cyanobacterial composition and their diversity during instability and stability periods. MBFG VII, composed by colonial cyanobacteria with mucilage, was associated with reduced values of electrical conductance and alterations in pH. The predominance of filamentous species with heterocyst (MBFG III) occurs only during the hydrodynamic stability period and did not show significant association with analyzed parameters. The co-dominance of MBGFs III, V and VII along with high species diversity of phytoplankton community occurred during the second hydrodynamic instability period which was associated with the reduction in water temperature. It is concluded that the decrease in cyanobacterial species dominance and the general increase in the diversity of phytoplankton community are influenced by pluvial anomaly. The higher water level during the period of pluvial anomaly resulted in nutrient pulse and the mixing of water column in the reservoir, which determined the MBPG phytoplankton community distribution.

scholarly journals Composition and diversity of anurans in the Restinga of the Conde municipality, northern coast of the state of Bahia, northeastern Brazil

2016 ◽  
Vol 16 (3) ◽  
Author(s):  
Felipe Augusto Trindade Gondim-Silva ◽  
Alessandra Rodrigues Santos Andrade ◽  
Rafael Oliveira Abreu ◽  
Jamile Santos Nascimento ◽  
Geovane Paixão Corrêa ◽  
...  
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Species Composition ◽  
Rainy Season ◽  
Dominant Species ◽  
The State ◽  
Northeastern Brazil ◽  
Freshwater Wetland ◽  
Northern Coast ◽  
Anuran Species

Abstract The Conde municipality is located in the northern coast of the state of Bahia (NC), northeastern Brazil, and is part of the Atlantic Tropical domain. The anuran fauna of the northern portion of the NC is still poorly known if compared to the southern portion. The Restinga is one of the predominant environments of the coastal plains of the NC and it is characterized essentially by presenting sandy soil covered by herbaceous and shrubby vegetation. The objective of this study was to determine the anuran species composition and diversity for the Restinga of the Conde municipality. Sampling was carried out at night by active search over four periods of five consecutive days each, two over the 'main rainy season' and two in a 'lesser rainy season', using 14 sample units (SUs) and five extra sample plots (EPs). We calculated dominance and species diversity using the Berger-Parker and Shannon-Wiener H' indices, respectively. We used accumulation curves and the Jackknife 1 estimator to estimate anuran species richness, considering only the data obtained from the SUs. We recorded 713 anuran specimens distributed within 33 species, 13 genera and five families (Bufonidae, Craugastoridae, Hylidae, Leptodactylidae and Microhylidae). The Hylidae and Leptodactylidae families had the highest species richness. Considering only the SUs (Jackknife 1 estimator in brackets), we recorded 28 species in the study area (33.9 ± 2.3), 13 in Shrubby Vegetation Zones - SVZ (20.8 ± 2.9) and 25 in Freshwater Wetland Zones - FWZ (28.9 ± 1.9). The abundance and species diversity of the FWZ (n = 638 specimens; H'= 2.4) were higher than those recorded for the SVZ (n = 52 specimens; H' = 1.9). The SVZ and FWZ showed distinct dominant species, wherein Pristimantis paulodutrai was the dominant species in SVZ and Scinax fuscomarginatus in FWZ. The Restinga of the Conde municipality stands out as the one with the highest anuran species richness already recorded considering only SVZ and FWZ. Moreover, its anuran species composition represented 55% of the anuran species known for the NC and included taxa common to three different morphoclimatic domains (Tropical Atlantic, Cerrado and Caatinga).

scholarly journals Database of Romanian cave invertebrates with a Red List of cave species and a list of hotspot/coldspot caves

2020 ◽  
Vol 8 ◽  
Author(s):  
Oana Teodora Moldovan ◽  
Sanda Iepure ◽  
Traian Brad ◽  
Marius Kenesz ◽  
Ionuț Cornel Mirea ◽  
...  
Keyword(s):  
Species Diversity ◽  
Human Impact ◽  
Critical Analysis ◽  
Systematic Position ◽  
Geographic Region ◽  
Red List ◽  
Gis Application ◽  
Cave Fauna ◽  
Population Sizes ◽  
Unique Species

The increasing human impact in Romanian caves raises the urgency of publishing a correct database of the strictly-adapted cave fauna. Previous attempts at indexing cave fauna and classifying caves by using their fauna opened many questions regarding the use of an incomplete list of cave species and mixed lists of troglobionts/stygobionts with troglophiles/stygophiles for ranking caves with priority for protection. It has also become obvious that there is a need to publish a list of Romanian cave species that are under threat. Cave species in Romania (and elsewhere) are endemic on small ranges, are unique and must be considered as important units for conservation. A cave must be equally protected if it has one or more rare and strictly endemic cave species. Although not exhaustive, we here provide the first checklist of Romanian troglobionts/stygobionts developed in the framework of the DARKFOOD and GROUNDWATERISK projects, coordinated by the “Emil Racovita” Institute of Speleology, Cluj-Napoca, Romania. The GIS application was used to complement the checklist of cave species with data on caves and surface environments above the caves. Until complete data on species diversity and population sizes are made available for each cave, measures of conservation can be implemented, based on the presence/absence of cave species, while classifications of caves for protection, based on the number of species, must be avoided. We also propose a list of Romanian caves with fauna that are under threat and a tentative Red List of Romanian troglobiont/stygobionts. This is the first database with identified troglobiont and stygobiont species of Romania, with a critical analysis of their distribution inside the country. A list of caves that need protection for their rare and unique species and a tentative Red List of Romanian cave fauna are also added. A total of 173 species were identified, of which 77 troglobionts and 96 stygobionts are currently registered in 366 caves. The database is divided into two parts, one part with a list of troglobionts, their revised systematic position, cave name, cave code and geographic region; and the second part with the same information on stygobionts. The database represents the contribution of many active researchers, who are the authors of this paper and of review publications of many other authors of the "Emil Racoviță" Institute of Speleology.

scholarly journals Species diversity ofLeishmania (Viannia)parasites circulating in an endemic area for cutaneous leishmaniasis located in the Atlantic rainforest region of northeastern Brazil

2009 ◽  
Vol 14 (10) ◽  
pp. 1278-1286 ◽  
Author(s):  
Maria Edileuza F. Brito ◽  
Maria S. Andrade ◽  
Mitzi G. Mendonça ◽  
Cláudio J. Silva ◽  
Ericka L. Almeida ◽  
...  
Keyword(s):  
Species Diversity ◽  
Cutaneous Leishmaniasis ◽  
Endemic Area ◽  
Northeastern Brazil ◽  
Atlantic Rainforest

Grazing reduces plant species diversity of Caatinga dry forests in northeastern Brazil

2019 ◽  
Vol 22 (2) ◽  
pp. 348-359 ◽  
Author(s):  
Katharina Schulz ◽  
Maike Guschal ◽  
Ingo Kowarik ◽  
Jarcilene Silva de Almeida‐Cortez ◽  
Everardo Valadares de Sá Barreto Sampaio ◽  
...  
Keyword(s):  
Species Diversity ◽  
Plant Species ◽  
Plant Species Diversity ◽  
Northeastern Brazil ◽  
Dry Forests

scholarly journals Species diversity, phylogeny and genetic variability of begomovirus populations infecting leguminous weeds in northeastern Brazil

2011 ◽  
Vol 61 (3) ◽  
pp. 457-467 ◽  
Author(s):  
S. J. C. Silva ◽  
G. P. Castillo-Urquiza ◽  
B. T. Hora-Júnior ◽  
I. P. Assunção ◽  
G. S. A. Lima ◽  
...  
Keyword(s):  
Species Diversity ◽  
Genetic Variability ◽  
Northeastern Brazil

Is crop yield related to weed species diversity and biomass in coconut and banana fields of northeastern Brazil?

2016 ◽  
Vol 220 ◽  
pp. 175-183 ◽  
Author(s):  
Arne Cierjacks ◽  
Maik Pommeranz ◽  
Katharina Schulz ◽  
Jarcilene Almeida-Cortez
Keyword(s):  
Species Diversity ◽  
Crop Yield ◽  
Northeastern Brazil ◽  
Weed Species

scholarly journals Species diversity of the genus Riccia L. (Marchantiales, Ricciaceae) in Maranhão state, Brazil

Check List ◽  
2018 ◽  
Vol 14 (5) ◽  
pp. 763-769
Author(s):  
José Augusto dos Santos Silva ◽  
Rozijane S. Fernandes ◽  
Denise Pinheiro Costa
Keyword(s):  
Species Diversity ◽  
Northeastern Brazil ◽  
State Records

Ricciaceae is a little-known liverwort family in northeastern Brazil. Fieldwork in 4 localities in Maranhão state yielded 4 species of Riccia, with 2 taxa, R. mauryana and R. weinionis, representing new state records. This paper describes the species diversity of the genus Riccia in Maranhão state, and provides descriptions, ecological notes, and illustrations for each species.

Lasiodiplodia species diversity associated with coconut leaf blight and stem-end rot in Northeastern Brazil

2021 ◽  
Author(s):  
Iwanne Lima Coelho ◽  
Tereza Cristina de Assis ◽  
Luiz Gonzaga Biones Ferraz ◽  
Moisés Thiago de Souza Freitas ◽  
Valdir de Queiroz Balbino ◽  
...  
Keyword(s):  
Species Diversity ◽  
Leaf Blight ◽  
Northeastern Brazil

A review of the cave fauna of Canada, and the composition and ecology of the invertebrate fauna of caves and mines in Ontario

1988 ◽  
Vol 66 (5) ◽  
pp. 1197-1213 ◽  
Author(s):  
Stewart B. Peck
Keyword(s):  
British Columbia ◽  
Species Diversity ◽  
Relative Humidity ◽  
Environmental Gradients ◽  
Forest Litter ◽  
Invertebrate Fauna ◽  
Terrestrial Invertebrates ◽  
Cave Fauna ◽  
Seasonal Basis ◽  
Total Community

Caves and cave-inhabiting faunas of Canada are reviewed. Four species of troglobitic (cave-limited) crustaceans (Amphipoda and Isopoda) are known from Alberta and British Columbia, and one troglobitic mite from Alberta. A study of the subterranean fauna of Ontario involved investigating 35 caves and mines. Collections of 1274 invertebrate specimens contained 301 species in 5 phyla, with spiders and insects being most numerous. Diptera were the most abundant insects with 140 species, mainly in the families Culicidae, Mycetophilidae, and Tipulidae. The fauna is predominantly composed of trogloxenes, in the "parietal association." Few troglophiles and no troglobites were found. The fauna is most abundant in individuals and richest in species diversity within the first 10 m of the entrances, just inside the dark zone, and at 12–14 °C. The total "community" of terrestrial invertebrates does not show significant preferences in either caves or mines for precise locations on environmental gradients of light, temperature, or relative humidity. Faunal movements and changes occur on a daily and a seasonal basis. There is no clear difference between the faunas of "old" caves and those of "young" mines. The cave and mine faunas are generally scavengers or predators recruited from nearby forest litter and soil populations. None of the species were significantly outside their previously known distributional range.

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