scholarly journals Helminth parasitizing Iberolacerta cyreni (Müller et Hellmich, 1937) from Gredos Mountains, Iberian Peninsula

2017 ◽  
Vol 31 ◽  
pp. 69-75
Author(s):  
Vicente Roca
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Iberian Peninsula ◽  
Host Species ◽  
Conservation Status ◽  
Natural Habitat ◽  
Species Richness And Diversity ◽  
Helminth Communities

A survey of the helminth communities of a population of Iberolacerta cyreni (Müller et Hellmich, 1937), a small lizard endemic to Sistema Central (Iberian Peninsula), was conducted to determine the prevalence, abundance and species diversity of parasites of these reptiles. Four species of helminths were found, one trematode, Plagiorchis molini Lent et Freitas, 1940, one cestode, Nematotaenia tarentolae López-Neyra, 1944, and two nematodes, Skrjabinelazia sp. and Spauligodon carbonelli Roca & García-Adell, 1988. Helminth infracommunities of I. cireny showed very low values of abundance and species richness and diversity, being similar to other European lizards. The parasites found seem to have no influence on the conservation status of the host species in its natural habitat .

The helminth community of the skink Chalcides sexlineatus from Gran Canaria (Canary Islands)

2011 ◽  
Vol 86 (2) ◽  
pp. 237-240 ◽  
Author(s):  
V. Roca ◽  
M.A. Carretero ◽  
F. Jorge ◽  
A. Perera ◽  
A. Ferrero ◽  
...  
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Canary Islands ◽  
Parasite Species ◽  
Intestinal Parasites ◽  
Helminth Community ◽  
Gran Canaria ◽  
Species Richness And Diversity ◽  
Gastrointestinal Helminth ◽  
Helminth Communities

AbstractA survey of the gastrointestinal helminth communities of a population of Chalcides sexlineatus Steindachner, a small skink endemic to Gran Canaria island (Canary Archipelago, Spain), was conducted to determine the prevalence, abundance and species diversity of intestinal parasites in these reptiles. Only three parasite species were found, one cestode, Oochoristica agamae Baylis, 1919 and two nematodes, Parapharyngodon micipsae (Seurat, 1917) and Pharyngodonidae gen. sp. Helminth infracommunities of C. sexlineatus showed low values of abundance and species richness and diversity, being more similar to the helminth community of Tarentola boettgeri boettgeri (Steindachner) rather than those of Gallotia stehlini (Schenkel), both syntopic with the sampled host.

Impacts of Prescribed Fire, Glyphosate, and Seeding on Cogongrass, Species Richness, and Species Diversity in Longleaf Pine

2013 ◽  
Vol 6 (4) ◽  
pp. 536-544 ◽  
Author(s):  
Stephen F. Enloe ◽  
Nancy J. Loewenstein ◽  
David W. Held ◽  
Lori Eckhardt ◽  
Dwight K. Lauer
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Prescribed Fire ◽  
Longleaf Pine ◽  
Pine Forests ◽  
Herbaceous Species ◽  
Integrated Strategies ◽  
Species Richness And Diversity ◽  
Herbicide Treatments ◽  
Rhizome Biomass

AbstractCogongrass [Imperata cylindrica (L.) Beauv.] is a warm-season, rhizomatous grass native to southeast Asia that has invaded thousands of hectares in the southeastern United States. Its negative impacts on pine forests have been well documented, and aggressive control is widely recommended. Although repeated herbicide treatments are effective for suppression, integrated strategies of prescribed burning coupled with herbicide treatment and revegetation are lacking in pine systems. In particular, longleaf pine forests, which are typically open, fire-dependent, communities, are highly susceptible to cogongrass, which is a pyrogenic species. To address management goals for cogongrass control and herbaceous restoration in longleaf pine forests better, field studies were conducted in southwestern Alabama from 2010 to 2012. Two longleaf pine forests with near-monotypic stands of cogongrass in the understory were selected for study. Treatments included combinations of winter prescribed fire, spring and fall glyphosate herbicide treatments, and seeding a mix of native, herbaceous species. Data were collected for three growing seasons following study initiation, and included seasonal herbaceous species cover and final cogongrass shoot and rhizome biomass. Species richness and diversity were calculated and analyzed to ascertain treatment effects over the duration of the study. Burning slightly improved cogongrass control with glyphosate, but had no effect on total cover, species richness, or species diversity. Three glyphosate treatments reduced total vegetative cover and nearly eliminated cogongrass cover, shoot, and rhizome biomass. Glyphosate and glyphosate + seeding also increased herbaceous species richness and diversity. However, aboveground productivity in treated plots was significantly lower than productivity in the untreated control, which was almost exclusively cogongrass. These studies indicate that glyphosate and integrated strategies utilizing glyphosate and seeding are very useful for cogongrass management and increasing herbaceous species richness and diversity in longleaf pine.

scholarly journals Baseline Assessments of Wildlife Biodiversity Within Selected Areas of Central Visayas, Philippines

2021 ◽  
Vol 6 (2) ◽  
pp. 27-34
Author(s):  
RP Jose ◽  
WA Aureo ◽  
CI Narido ◽  
TD Reyes Jr ◽  
MB Sarnowski
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Diversity Index ◽  
Population Trends ◽  
Species Richness And Diversity ◽  
Natural Park ◽  
Biodiversity Inventories ◽  
Baseline Information ◽  
High Diversity ◽  
Areas Of Protection

A comprehensive inventory of faunal biodiversity was conducted within three Key Biodiversity Areas of Central Visayas. Mt. Bandilaan Natural Park (MBNP), Balinsasayao Twin Lakes Natural Park (BTLNP), and Rajah Sikatuna Protected Landscape (RSPL). Three primary wildlife groups were surveyed: bats, birds and amphibians. Species diversity and population trends were then analyzed to assess areas of biodiversity importance. RSPL generally had the highest species richness and diversity index while MBNP consistently had the lowest. When pooled. The surveyed areas resulted in a high diversity index and rate of endemicity showing the importance of multiple areas of protection. These findings can be utilized to prioritize habitat protection as well as to serve as a baseline information for future biodiversity inventories. J. Biodivers. Conserv. Bioresour. Manag. 2020, 6(2): 27-34

The dynamics of intestinal helminth communities in eels Anguilla anguilla in a small stream: long-term changes in richness and structure

Parasitology ◽  
1993 ◽  
Vol 107 (1) ◽  
pp. 71-78 ◽  
Author(s):  
C. R. Kennedy
Keyword(s):  
Species Richness ◽  
Community Structure ◽  
Recovery Period ◽  
Intestinal Helminth ◽  
Helminth Community ◽  
Component Community ◽  
Small Stream ◽  
Habitat Changes ◽  
Species Richness And Diversity ◽  
Helminth Communities

SummaryThe prediction that species richness and diversity of intestinal helminth communities in eels would change over time in response to habitat changes was tested over a period of 13 years in a small stream subjected to extensive human management. Nearly all measures of helminth community structure adopted indicated a decline in richness and diversity over the first 6 years followed by a recovery over the last few years to levels unexpectedly close to those at the start of the investigation. Changes in total number of species suggested that the component community was far richer (from 3–9 species) at the end of the period. By contrast, changes in diversity and dominance measures revealed less variation than expected and suggested that there was an underlying stability of community structure characterized by high dominance by a single species, although the identity of this changed, low diversity and a large proportion of the eel population harbouring 0 or only 1 species. A similar pattern of changes was recorded in the infra-communities, where values of species richness and diversity were very similar at the commencement and termination of the study. It appeared that those helminths that colonized in the recovery period contributed to community richness but had little impact on community structure. The helminth communities clearly did change in response to habitat changes, and the evidence for a fixed number of niches and an underlying constancy in helminth community structure in eels is evaluated.

scholarly journals Metazoan parasites of trachinid fishes (Teleostei: Trachinidae) from Tunisian coasts (Mediterranean Sea)

2017 ◽  
Vol 58 (2) ◽  
pp. 209-224 ◽  
Author(s):  
Ramla Azizi ◽  
Chiraz Yemmen ◽  
Sihem Bahri
Keyword(s):  
Species Richness ◽  
Mediterranean Sea ◽  
Host Species ◽  
Metazoan Parasites ◽  
Species Richness And Diversity ◽  
Parasitological Survey

A parasitological survey of Trachinus draco Linnaeus, 1758; Trachinus araneus Cuvier, 1829 and Trachinus radiatus Cuvier, 1829 collected from Tunisian coasts was performed from January 2014 to January 2015. In total, 18 species of metazoan parasites belonging to 13 genera were found: nine Myxozoa, four Nematoda, one Cestoda, one Digenea, one Monogenea, one Isopoda and one Annelida Hirudinea. Data on morphology, location and infection levels of parasites were provided. The higher species richness was recorded in Trachinus draco (18 species), while Trachinus radiatus and Trachinus araneus harbored 9 and 7 species, respectively. Species richness and diversity according to the host species and the sampling sites based on the Simpson and Shannon-Wiener indices are reported.

scholarly journals An Estimation of Tree Species Diversity in Rural Farmland of Nepal

1970 ◽  
Vol 18 (1) ◽  
pp. 3-10 ◽  
Author(s):  
Deepak K Kharal ◽  
Bishwa N Oli
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Socioeconomic Factors ◽  
Tree Species ◽  
Natural Habitat ◽  
Wide Distribution ◽  
Large Sample Size ◽  
Tree Species Diversity ◽  
Natural Forests ◽  
Species Biodiversity

Biodiversity is an important consideration in maintaining natural environmental balance in a particular habitat. This becomes particularly important in areas, where due to the encroachment of natural forests, biodiversity is depleting causing a potential loss in the natural habitat. In such a situation, biodiversity in the farmland becomes an important consideration. Biodiversity is measured and analyzed using various indices. In this study, we present the result of our study through a field work in a rural village in Nepal. The study was conducted through direct field observation and survey of sampled households. The status of tree biodiversity using species biodiversity index and species richness index for the case study are presented. The study has also identified the relationship between the tree species diversity and major socioeconomic factors. Our analysis shows that tree species biodiversity in the rural farmland of study area are lower in comparison to the similar areas of countries like India, Bangladesh and Sri Lanka. The lower biodiversity status is mainly due to the wide distribution of two dominating tree species of Dalbergia sissoo and Melia azederach. Similarly, Tree species biodiversity in the farm land has been found affected by the socioeconomic situation of the area. Further study is suggested by involving more socioeconomic factors and covering a large sample size and time of study. Key words: Farmland, Forest, Homegarden, Nepal, Species Diversity, Species Richness, Trees. doi: 10.3126/banko.v18i1.2160 Banko Janakari, Vol. 18, No. 1, 3-10

The distribution of dragonfly nymphs across a pH gradient in south-central Ontario lakes

1992 ◽  
Vol 70 (5) ◽  
pp. 878-885 ◽  
Author(s):  
J. Bruce Pollard ◽  
Michael Berrill
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Emergent Vegetation ◽  
Ph Gradient ◽  
Species Richness And Diversity ◽  
Number Of Species ◽  
South Central ◽  
Two Measures ◽  
Species Shifts ◽  
Dragonfly Nymphs

Exuviae of 37 species of dragonflies were collected from the emergent vegetation of 19 small (<35 ha) lakes across a pH gradient (range 4.9–8.1) in south-central Ontario to assess the effect of low environmental pH on species richness and diversity. The number of species present in a lake was not significantly correlated with lake pH. Two measures of diversity (Keefe and Bergersen's TU and McIntosh's M) indicate an increase in species diversity with decreasing lake pH. Species shifts in the communities were also correlated with lake pH: five species were apparently excluded from lakes with a midsummer epilimnetic pH below 5.8, and seven species were apparently restricted to lakes with a pH of less than 6.2.

Distribution of parasitic fungal species richness: influence of climate versus host species diversity

2008 ◽  
Vol 14 (5) ◽  
pp. 786-798 ◽  
Author(s):  
Corinne Vacher ◽  
Denis Vile ◽  
Emmanuelle Helion ◽  
Dominique Piou ◽  
Marie-Laure Desprez-Loustau
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Host Species ◽  
Fungal Species

scholarly journals The abundance and diversity of grasshopper communities in relation to elevation and land use in Malang, Indonesia

2020 ◽  
Vol 21 (12) ◽  
Author(s):  
Amin Setyo Leksono ◽  
Bagyo Yanuwiadi ◽  
Aminudin Afandhi ◽  
MOHAMMAD FARHAN ◽  
Anisa Zairina
Keyword(s):  
Land Use ◽  
Species Richness ◽  
Species Diversity ◽  
Altitudinal Gradient ◽  
Landsat Imagery ◽  
Abiotic Factors ◽  
Significant Negative Correlation ◽  
Grasshopper Species ◽  
Species Richness And Diversity ◽  
Abundance And Diversity

Abstract. Leksono AS, Yanuwiadi B, Afandhi A, Farhan M, Zairina A. 2020. The abundance and diversity of grasshopper communities in relation to elevation and land use in Malang, Indonesia. Biodiversitas 21: 5614-5620. Ecological factors include interactions of the community members with numerous biotic and abiotic factors such as temperature, humidity, precipitation, light intensity, and seasonality show an altitudinal gradient. Most grasshopper species play a role as herbivores and are a good source of protein for other animals such as amphibians, small reptiles, birds, and small mammals. This study aimed to analyze variations in the abundance, richness, and diversity of grasshopper species along an altitudinal gradient. This research was conducted in five locations in Malang District, East Java, Indonesia, namely Bantur, Sumber Pujung Lawang, Pujon, and Poncokusumo. Grasshopper sampling was carried out by the sweeping method using an insect net. Sweepings were carried out on four plots with each plot size of 2 x 10 m2. Sampling was conducted four times from June to August 2020. The data were analyzed using the Shannon Wiener index (diversity analysis) and the Bray-Curtis index. The differences between locations were tested by one-way analysis of variance. Land use was analyzed by ArcGIS, using Landsat imagery 8. The abundance of grasshoppers had a significant negative correlation with elevation. That correlation was positive to species richness and diversity of grasshoppers. That with species diversity was significant, while that with species richness was not significant. The greatest abundance of the grasshopper was found in the middle elevation in Lawang (19.39 ± 2.12). In contrast, the highest species richness and diversity were found in the highest elevation in Poncokusumo (richness = 15.75 ± 1.60 and H '= 2.58 ± 0.11). Land use variation was not significant on abundance, species, richness, and diversity of grasshoppers. Interestingly, the high similarity of the grasshopper compositions in low elevation habitats was detected, indicating that land use in the low land area was remarkable. The abundance of grasshopper had a significant positive correlation with temperature but negatively correlated with humidity. There was no significant correlation among species richness, species diversity with temperature and humidity.

Helminth communities of four commercially important fish species from Chetumal Bay, Mexico

2007 ◽  
Vol 81 (1) ◽  
pp. 19-31 ◽  
Author(s):  
M.L. Aguirre-Macedo ◽  
V.M. Vidal-Martínez ◽  
D. González-Solís ◽  
P.I. Caballero
Keyword(s):  
Species Richness ◽  
Fish Species ◽  
Host Species ◽  
Feeding Habits ◽  
Coastal Lagoons ◽  
Helminth Species ◽  
Biological Characteristics ◽  
Current Debate ◽  
Helminth Communities ◽  
Host Habitat

AbstractThe relative importance of ecology and evolution as factors determining species richness and composition of the helminth communities of fish is a matter of current debate. Theoretical studies use host–parasite lists, but these do not include studies on a temporal or spatial scale. Local environmental conditions and host biological characteristics are shown to influence helminth species richness and composition in four fish species (Eugerres plumieri, Hexanematichthys assimilis, Oligoplites saurus, and Scomberomorus maculatus) in Chetumal Bay, Mexico. With the exception of H. assimilis, the helminth communities had not been previously studied and possible associations between environmental and host biological characteristics as factors determining helminth species richness and composition using redundancy analysis (RDA) are described. Thirty-four helminth species are identified, with the highest number of species (19 total (mean = 6.3 ± 2.1)) and the lowest (9 (4.0 ± 1.0)) occurring in H. assimilis and S. maculatus, respectively. The larval nematodes Contracaecum sp. and Pseudoterranova sp. were not only the helminth species shared by all four host species but also were the most prevalent and abundant. Statistical associations between helminth community parameters and local ecological variables such as host habitat use, feeding habits, mobility, and time of residence in coastal lagoons are identified. Phylogeny is important because it clearly separates all four host species by their specialist parasites, although specific habitat and feeding habits also significantly influence the differentiation between the four fish species.

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