scholarly journals Angiosperms, Los Tuxtlas Biosphere Reserve, Veracruz, Mexico

Check List ◽  
2009 ◽  
Vol 5 (4) ◽  
pp. 787 ◽  
Author(s):  
Víctor Arroyo-Rodríguez ◽  
Jacob C. Dunn ◽  
Julieta Benítez-Malvido ◽  
Salvador Mandujano
Keyword(s):  
Introduced Species ◽  
Plant Diversity ◽  
Biosphere Reserve ◽  
Los Tuxtlas ◽  
Check List ◽  
Forest Reserve ◽  
Field Station ◽  
Breast Height ◽  
Mexican Government ◽  
Different Levels

The Los Tuxtlas Reserve has been heavily deforested and fragmented since the 1970’s. Although the flora of Los Tuxtlas has been described previously, most floristic lists come from the large forest reserve of the Los Tuxtlas field station. Here we present a check list of Angiosperms recorded in 45 rainforest fragments (< 1 to 266 ha) located in three landscapes with different levels of deforestation. We sampled all trees, shrubs, lianas, palms and herbs with diameter at breast height (dbh) Ā 2.5 cm within ten 50 m x 2 m plots per fragment. We recorded 9,435 plants belonging to 73 families and 372 species. Fabaceae, Rubiaceae, and Moraceae were best represented. Eight species are classified as Endangered by the Mexican government, and five are human-introduced species. We conclude that the conservation and restoration of all the remaining rainforest fragments are necessary to effectively preserve the plant diversity of this region.

scholarly journals Geospatial Assessment of Carbon Sequestration in Oluwa Forest, South-West Nigeria

2017 ◽  
Vol 1 (1) ◽  
pp. 188-202
Author(s):  
E. O. Makinde ◽  
M. O. Ogundeko ◽  
A. A. Womiloju
Keyword(s):  
Belowground Biomass ◽  
Allometric Equation ◽  
Total Carbon ◽  
Forest Reserve ◽  
Geospatial Technology ◽  
Breast Height ◽  
Forest Strata ◽  
Sample Points ◽  
Supervised Image Classification ◽  
Remote Sensing Methods

The potential of the forest as a natural sink is vast and enormous and has been well documented in several types of research and reports. This project is an attempt at re-emphasizing this potential, by using geospatial technology, to quantify the amount of carbon sequestered by the Oluwa Forest Reserve. Remote sensing methods, specifically supervised image classification augmented with field data, were employed. Landsat imageries of 1984, 1991, 2002, 2010 and 2015 were obtained and the maximum likelihood supervised classification algorithm was used in obtaining the landuse/land cover information for those years. From this, the trend in the landuse was monitored and ascertained. The study revealed two distinct tree species, and subsequently, four forest strata were established. The heights and diameters at breast height of the trees from ten randomly selected 20 m × 20 m sample points, were measured. The allometric equation of Brown (1989, 1997) was used in estimating the above ground and belowground biomass while the Soil Organic Carbon (SOC) was obtained from the laboratory test on the soil samples, taken at 0 –15 cm, and 15 – 30 cm from the ten sample points using the Walkey Black method. The total above and belowground biomass was obtained to be 162,826.343 Mg/ha and 32,565.269 Mg/ha respectively while the total SOC was 5.7971 Mg/ha. The total carbon sequestered by the forest was estimated to be 358.565 Mg Ca. A multiple regression analysis was carried out and an adjusted r-squared value of 0.9809 with an ftest significance of -0.000000401 was obtained. This is to find the correlation between the biomass and the dbh, diameter at breast height and the tree heights, h.

scholarly journals Shola tree regeneration is lower under Lantana camara L. thickets in the upper Nilgiris plateau, India

2019 ◽  
Vol 11 (12) ◽  
pp. 14562-14568
Author(s):  
Muneer Ul Islam Najar ◽  
Jean-Philippe Puyravaud ◽  
Priya Davidar
Keyword(s):  
Protected Areas ◽  
Biosphere Reserve ◽  
Tree Regeneration ◽  
Lantana Camara ◽  
Regeneration Potential ◽  
Invasive Shrub ◽  
Nilgiri Biosphere Reserve ◽  
Different Levels

Lantana camara is a dominant invasive shrub in many protected areas of India including the Nilgiri Biosphere Reserve (NBR).  We conducted a study to assess the regeneration potential of endemic native (shola) trees under different levels of Lantana infestation in the upper plateau of NBR.  A total of 61 plots in a total area of 0.73ha were sampled, out of which 0.57ha was in Lantana dominated sites and 0.16ha in undisturbed shola forests.  The plots were classified as per the level of Lantana infestation (intensive, moderate, and low infestation). We found that regeneration of shola trees, including endemics decreased with increasing intensity of Lantana invasion.  No regeneration occurred in the intensively infested plots whereas regeneration was high in undisturbed shola forests.  

Disentangling the effects of legacies from those of current land use on soil properties in Los Tuxtlas Biosphere Reserve, Mexico

2020 ◽  
Vol 153 ◽  
pp. 103578 ◽  
Author(s):  
Simoneta Negrete-Yankelevich ◽  
Carlos Andrés Cultid-Medina ◽  
Tajín Fuentes-Pangtay ◽  
Javier Álvarez-Sánchez ◽  
Silke Cram ◽  
...  
Keyword(s):  
Land Use ◽  
Soil Properties ◽  
Biosphere Reserve ◽  
Los Tuxtlas

Whiteflies of Belize (Hemiptera: Aleyrodidae)Part 2óa review of the subfamily Aleyrodinae Westwood

Zootaxa ◽  
2005 ◽  
Vol 1098 (1) ◽  
pp. 1 ◽  
Author(s):  
JON H. MARTIN
Keyword(s):  
New Species ◽  
Host Plant ◽  
Field Survey ◽  
New Genera ◽  
Check List ◽  
Forest Reserve ◽  
Line Drawings ◽  
Putative Species ◽  
Taxonomic Changes

A field survey of Sternorrhyncha (Hemiptera) in Belize, principally conducted within the Chiquibul Forest Reserve (CFR), has revealed almost 200 species of whiteflies, all but 40 of them belonging to the subfamily Aleyrodinae. Provided here is an illustrated account of described Belize species of Aleyrodidae-Aleyrodinae. This account proposes three new generic synonymies, three new specific synonymies, nine ten combinations, one revalidated species and provides descriptions of three new genera and 12 new species. Two appendices are provided: a check list, which includes species remaining undescribed, and the associated host-plant genera or families (when known) of all putative species; and a summary of taxonomic changes proposed here. Line drawings and/or photographs of slide-mounted puparia are provided for all described species, and photographs alone are provided for a few of the more distinctive species that remain undescribed.

Herpetofauna diversity and microenvironment correlates across a pasture–edge–interior ecotone in tropical rainforest fragments in the Los Tuxtlas Biosphere Reserve of Veracruz, Mexico

2006 ◽  
Vol 132 (1) ◽  
pp. 61-75 ◽  
Author(s):  
J. Nicolás Urbina-Cardona ◽  
Mario Olivares-Pérez ◽  
Víctor Hugo Reynoso
Keyword(s):  
Tropical Rainforest ◽  
Biosphere Reserve ◽  
Los Tuxtlas

scholarly journals Unexplained Relationships of Height-Diameter of Three Tree Species in a Tropical Forest.

2013 ◽  
Vol 6 (3) ◽  
pp. 196-204
Keyword(s):  
Tree Species ◽  
Coefficient Of Determination ◽  
Multivariate Models ◽  
Forest Reserve ◽  
Permanent Sample Plots ◽  
Tree Distance ◽  
Diameter At Breast Height ◽  
Breast Height ◽  
Bivariate Models

Associations between bivariate variables relative to the unexplained relationships of height-Dbh (diameter at breast height) models were investigated. Seven permanent sample plots measuring 40m by 250m at Omo Forest Reserve were used to assess the relationships between height and diameter at breast height of three tree species as affected by the variables of neighbouring trees. The result showed differences in the coefficient of determination of the bivariate models and multivariate models. The models arrived at for each of the species and for the bivariate models are: Scottelia coriaceae: Ht = 2.59 + 0.473D+ 0.0012D2 for 5cm ≤ D ≤100cm (R2 = 0.70) Sterculia rhinopetala: Ht = 5.96 + 0.467D+ 0.00296D2 for 5cm ≤ D ≤100cm (R2 = 0.77) Strombosia pustulata: Ht = 2.02 + 0.722D+ 0.00581D2 for 5cm ≤ D ≤ 60cm (R2 = 0.81) Where both Ht and D are height and Diameter at breast height. While on the other hand the multivariate models that considered the effect of neighbouring trees are: Scottelia coriaceae: 2 1 2 3 4 Ht = 3.74 + 0.41x −1.14x + 0.205x +1.278x (R = 0.723) Sterculia rhnopetala: 2 1 2 3 4 Ht = 6.18 + 0.2601x +1.163x + 0.438x − 0.442x (R = 0.608) Strombosia pustalata: 2 1 2 3 4 Ht = 6.84 + 0.399x − 0.318x − 0.138x − 0.838x (R = 0.650) x1 = diameter at breast height, x2 = Mean neighbouring tree distance, x3 = Frequency of the neighbouring tree and x4 = Position of the crown.

scholarly journals Baikalsky State Nature Biosphere Reserve and its buffer zone: floristic data

2022 ◽  
Vol 10 ◽  
Author(s):  
Natalia Gamova
Keyword(s):  
Vascular Plants ◽  
Biosphere Reserve ◽  
Buffer Zone ◽  
Field Studies ◽  
Herbarium Specimens ◽  
Check List ◽  
Floristic Data ◽  
State Nature

Baikalsky State Nature Biosphere Reserve is situated in the central part of the Khamar-Daban Range (Southern Baikal, Siberia), in three administrative districts of Republic of Buryatia (i.e. Kabansky District, Dzhidinsky District and Selenginsky District), Russia. In general, this territory has been relatively well studied by botanists, but until now there was no detailed information about the flora of the Reserve with precise geographic localities. Moreover, some records in the Baikalsky Reserve's flora were published without references to documenting herbarium specimens. The dataset contains 39,238 unique occurrences of 875 taxa (854 species, 14 subspecies, five varieties and two species aggregates) from the Baikalsky Reserve and its buffer zone. All the data were acquired during the field studies by the author in 2009–2021, when 152 taxa (17.3% of all the taxa included into the dataset) were first recorded by the author from the study area. Herbarium vouchers are preserved in the Moscow University Herbarium (MW). This dataset is the first attempt at creating a database of vascular plants of the Baikalsky Reserve and its buffer zone, based on modern research. These data will provide the background for the updated check-list of the Baikalsky Reserve's flora.

scholarly journals SIMULATION OF SPATIAL DISTRIBUTION OF RARE SPECIES IN PROTECTED NATURAL AREAS (ON THE EXAMPLE OF THE CENTRAL FOREST RESERVE, RUSSIA)

2019 ◽  
Vol 1 ◽  
pp. 75
Author(s):  
Anatoly Istomin ◽  
Sergey Mikhalap
Keyword(s):  
Spatial Distribution ◽  
Habitat Suitability ◽  
Rare Species ◽  
Vegetation Type ◽  
Biosphere Reserve ◽  
Entropy Method ◽  
Natural Areas ◽  
Forest Reserve ◽  
Integral Characteristics ◽  
Protected Natural Areas

An important task of modern ecology is the modeling of the spatial distribution of organisms. Of particular relevance is the modeling of the distribution of rare species in protected natural areas. The paper discusses the main stages and presents the results of modeling the habitat suitability of the Central Forest State Nature Biosphere Reserve (Russia, Tver region) for the red vole. This species is a rare and relict for the center of the Caspian-Baltic watershed. In the modelling the maximum entropy method (MaxEnt) was used. The basis for building the model was the field sampling of the authors, performed in July-August 2010-2014. Each year, trapping were carried out at 745 sampling points each of which has geographical referencing in the WGS 84. A total of 12238 trap-days were worked out and 141 red vole individuals were caught. In the process of modeling, the contribution to the species distribution of certain integral characteristics of habitats (relief, vegetation type and three vegetation spectral indices) was determined. A map model of habitat suitability for the red vole on the territory of the Reserve was built, which allowed to describe the spatial structure of the population groups of the species. The total areas of the most favorable sites for the habitat of the red vole on the reserve's territory were calculated.

scholarly journals Mamíferos de la Reserva de la Biósfera El Triunfo, Chiapas.

2014 ◽  
Vol 3 (1) ◽  
pp. 79 ◽  
Author(s):  
Eduardo Espinoza Medinilla ◽  
Alberto Anzures Dadda ◽  
Epigmenio Cruz Aldan
Keyword(s):  
Biosphere Reserve ◽  
Los Tuxtlas ◽  
Sierra Madre ◽  
Management Plans ◽  
Conservation Concern

Resumen. Se elaboró una lista de los mamíferos silvestres de la Reserva de la Bíosfera "El Triunfo". Se colectaron en campo, entre mayo de 1994 y agosto de 1996, 136 ejemplares (píel y cráneo), 72 huellas en molde de yeso y 25 restos óseos. También se consultaron las bases de datos de nueve museos nacionales y extranjeros en los que existen 528 registros para la reserva. Se registraron 112 especies, 75 géneros, 26 familias y 10 órdenes. El 86.6% de las especies pertenecen a los órdenes Chiroptera, Rodentia y Carnivora. Así mismo 39 especies están clasificadas con alguna categoría de riesgo. Comparada con Los Tuxtlas, El Ocote y Montes Azules, El Triunfo tiene el menor porcentaje de similitud de especies (indice de Szymkiewicz-Simpson). Los datos aportados por el estudio pueden ser de utilidad en los planes de manejo de la reserva, pero deben ser completados con investigación sobre distribución y abundancia en diferentes tipos de vegetación.Abstract. We compiled a checklist ofwild mammals from "El Triunfo" Biosphere Reserve. From May 1994 to August 1996 we collected 136 specimens (skin and skull), 72 footprints gypsum molds and 25 fragments osseous. Were reviewed also data of9 Mexican and foreign museums in which 528 records are present. The checklist is composed of 112 species, 75 genus, 26 families and 10 orders. 86.6% of these species belong to Chiroptera, Rodentia and Carnívora Orders. 39 species are cIassified in one of the categories of conservation concern. Compared with Los Tuxtlas, El Ocote and Montes Azules reserves, the mastofauna richness of "El Triunfo", has the lowest percentage of similarity among species (Szymkiewicz-Simpson' s index). The data obtained from this survey, can be used as part ofthe management plans of this reserve. However must be completed with research about distribution and abundance in several kinds of vegetation.Palabras clave: El Triunfo, mamíferos, diversidad, conservación, Síerra Madre de Chiapas.

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