scholarly journals EFEITO DA EXPLORAÇÃO DE IMPACTO REDUZIDO EM ALGUMAS ESPÉCIES DE SAPOTACEAE NO LESTE DA AMAZÔNIA

FLORESTA ◽  
2013 ◽  
Vol 43 (3) ◽  
pp. 395 ◽  
Author(s):  
Leonardo Pequeno Reis ◽  
José Natalino Macedo Silva ◽  
Pamella Carolline Marques Dos Reis ◽  
João Olegário Pereira de Carvalho ◽  
Waldenei Travassos de Queiroz ◽  
...  
Keyword(s):  
Rain Forest ◽  
Basal Area ◽  
Tree Density ◽  
The Other ◽  
Permanent Sample Plots ◽  
Structure And Dynamics ◽  
The Family ◽  
Commercial Species ◽  
Three New Species ◽  
Reduced Impact Logging

Avaliou-se o efeito da exploração de madeira, realizada em 1997, na estrutura e dinâmica de algumas espécies de Sapotaceae em uma Floresta Ombrófila Densa, no município de Moju, Pará (02º12’26”S e 48º48’14”W). De uma área de floresta de 1.050 ha, foram selecionados 200 hapara exploração seletiva de intensidade de 23 m3.ha-1. Nessa área, foram alocadas 22 parcelas permanentes de 0,5 ha, totalizando 11 ha amostrais, onde foram medidas todas as árvores com DAP ≥10 cm, nos anos de 1995 (antes da exploração), 1998 e 2010 (após exploração). Os parâmetros avaliados foram densidade (Da) e área basal (m2.ha-1). No período de 1995 a 2010, Sapotaceae apresentou uma redução significativa de 7,7% na densidade (p = 0,0147) e aumento na dominância em 1,4% (p = 0,7851). Nesse mesmo período, observou-se redução da densidade e dominância para Pouteria laurifolia (Gomes) Radlk. (66,7 e 50,6%), Pouteria macrocarpa (Mart.) D. Dietr. (25 e 29,4%), Micropholis acutangula (Ducke) Eyma (20 e 11%), Manilkara huberi (Ducke) A. Chev. (16,4 e 17,7%) e Manilkara paraensis (Huber) Standl. (12,5 e 31,4%). A espécie com maior valor comercial, M. huberi, não mostrou recuperação nesse parâmetro, porém houve ingresso de três novas espécies na população de Sapotaceae estudada.AbstractEffect of reduced impact logging in some sapotaceae species in the eastern amazon. Effect of logging, held in 1997, on structure and dynamics of some Sapotaceae species were evaluated in a dense tropical rain forest located in the municipality of Moju, Pará (02º 12’ 26” S e 48º 48’ 14” W). Two hundred ha out of 1,050 ha forest area were selectively logged for timber (23 m3ha-1 logging intensity) in 1997.Twenty-two 0.5 ha permanent sample plots (11 ha sample) were established and all trees with dbh ≥ 10 cm were identified and measured for dbh in 1995 (before logging), 1998 and 2010 (after logging). Parameters evaluated were Density (De) and Basal area (G-m2 ha-1). Sapotaceae presented a significant reduction of 7.7% on tree density (p=0.0147), and an dominance increase of 1.4% (p=0.7851). In the same period, decreases in density and basal area were observed to Pouteria laurifolia (Gomes) Radlk. (66.7 and 50.6%), Pouteria macrocarpa (Mart.) D. Dietr. (25 and 29.4%), Micropholis acutangula (Ducke) Eyma (20 and 11%), Manilkara huberi (Ducke) A. Chev. (16.4 and 17.7%) and Manilkara paraensis (Huber) Standl. (12.5 and 31.4%). The main commercial species M. Huberi did not recover its original density. On the other hand, three new species of the family were recorded in the focused period.Keywords: Forest management; Pouteria; Manilkara; Amazonian Forest.

Three new species of copepods (Copepoda: Calanoida and Cyclopoida) from anchialine habitats in Indonesia

Zootaxa ◽  
2012 ◽  
Vol 3150 (1) ◽  
pp. 36 ◽  
Author(s):  
GEOFF A. BOXSHALL ◽  
DAMIÀ JAUME
Keyword(s):  
New Species ◽  
The Philippines ◽  
The Other ◽  
Valid Species ◽  
Fine Scale ◽  
The Family ◽  
Two New Species ◽  
Three New Species ◽  
The Village ◽  
A New Species

Three new species of copepod crustaceans are described from material collected from anchialine and brackish habitats inand around the village of Walengkabola on the coast of Muna Island, to the southeast of Sulawesi. A new species of cy-clopoid, Paracyclopina sacklerae n. sp., was described from material collected from the tidal inflow entering into the bot-tom of sinkholes a few metres inland from the shoreline. Detailed comparisons are made with Paracyclopina orientalis(Lindberg, 1941), n. comb., a closely related congener here transferred from its original genus Cyclopetta Sars, 1913. Theassignment of Paracyclopina Smirnov, 1935 to the family Cyclopettidae is followed here despite uncertainty over the va-lidity of some of the families created by the break up of the former Cyclopinidae. Two new species of Boholina Fosshagen& Iliffe, 1989 are described, based on material from the same sinkholes and from caves located up to 700m inland fromthe coast and exhibiting further reduced salinity down to 1.8 ppt. One species, B. parapurgata n. sp., is very closely relatedto B. purgata Fosshagen & Iliffe, 1989 from Bohol island in the Philippines, the other B. munaensis n. sp., is very closelyrelated to B. crassicephala Fosshagen & Iliffe, 1989 also from Bohol island, but a number of fine scale differences in the leg 5 of both sexes are recognised in each case. Keys to valid species of both genera are provided.

scholarly journals Modelling regeneration and recruitment in a tropical rain forest

1992 ◽  
Vol 22 (9) ◽  
pp. 1235-1248 ◽  
Author(s):  
Jerome K. Vanclay
Keyword(s):  
Rain Forest ◽  
Tropical Rain Forest ◽  
Growth Models ◽  
Basal Area ◽  
Relative Number ◽  
Site Quality ◽  
Permanent Sample Plots ◽  
Second Stage ◽  
Number Of Stems ◽  
Stand Basal Area

A two-stage model predicts the recruitment (i.e., the number of stems reaching or exceeding 10 cm DBH) of the 100 species that account for 97% of all the recruitment observed on 217 permanent sample plots in the tropical rain forest of north Queensland. The first stage predicts the probability of the occurrence of any recruitment from stand basal area and the presence of that species in the existing stand. These probabilities can be implemented stochastically, or deterministically by summing the probabilities and initiating recruitment on unity. The second stage indicates the expected amount of recruitment, given that it is known to occur, and employs stand basal area, the relative number of trees of that species in the stand, and site quality. This approach is easily implemented in growth models and planning systems.

scholarly journals Nutrient fluxes in litterfall of a secondary successional alluvial rain forest in Southern Brazil

2018 ◽  
pp. 1869-1882
Author(s):  
Maurício Bergamini Scheer ◽  
Gustavo Gatti ◽  
Celina Wisniewski
Keyword(s):  
Forest Soil ◽  
Tree Species ◽  
Rain Forest ◽  
Forest Restoration ◽  
Nutrient Use Efficiency ◽  
Basal Area ◽  
The Other ◽  
Nutrient Concentrations ◽  
Nutrient Fluxes ◽  
Essential Components

During forest succession, litterfall nutrient fluxes increase significantly. The higher inputs of organic matter and nutrients through litterfall affects positively soil fertility and the species composition, which are essential components in forest restoration and management programs. In the present study, the input of nutrients to the forest soil via litterfall components was estimated for two sites of different development stages, in an early successional alluvial rain forest in Brazil. Litterfall returned to the soil, in kg/ha, ca. 93 N, 79 Ca, 24 K, 15 Mg, 6 P, 1.7 Mn, 0.94 Fe, 0.18 Zn, 0.09 Cu and 11.2 Al, in the site where trees were more abundant and had higher values of basal area. In the other area, where trees where less abundant and values of basal area were comparatively low, litterfall returned <50% of those amounts to the forest soil, except for Al. The amount of Al that returned to the soil was similar in both areas due to the high contribution of Tibouchina pulchra (82% of Al returned). Comparatively, high proportion of three dominant native tree species (Myrsine coriacea, T. pulchra and Cecropia pachystachya) explained better litter nutrient use efficiency (mainly N and P) in the site with the least advanced successional stage. Although litterfall of these species show lower nutrient concentrations than the other tree species, their nutrient fluxes were high in both sites, indicating a certain independence from soil essential nutrients. Such feature of the native species is very advantageous and should be considered in forest restoration programs.

scholarly journals Alzheimer's disease: family structure and dynamics

2011 ◽  
Vol 1 (1) ◽  
pp. 5-16
Author(s):  
Juan A. Álvarez-Ormazábal
Keyword(s):  
Family Structure ◽  
Psychometric Properties ◽  
The Other ◽  
Structure And Dynamics ◽  
Family Psychology ◽  
Faces Iv ◽  
The Family ◽  
General Functioning ◽  
New Instruments ◽  
Disease Family

This research focused on the study of structure, and dynamic of families containing one member diagnosed with Alzheimer´s disease. The interest in the changes during the cycle life and the study in the family psychology area have brought about new instruments whose objective is to obtain a better understanding of the systemic phenomena. One of these is the fourth version of a questionnaire created by Olson, Gorall y Tiesel (2006): FACES-IV, a test whose purpose is to evaluate a family´s cohesion and adaptability. The investigation was based on two central objectives: one was to examine the psychometric properties of a translated version of FACES-IV. The other was to observe to what extent the disease has influenced the cohesion and adaptability of the family in function of its structure and type. These objectives were realized by administering the test to 135 family members, coming from 69 families. The psychometric properties revealed a lack of validity in the unbalanced scales, but satisfactory in the cohesion and flexibility scales. The Olson’s model did not adequately fit the data. It was observed that the diagnosis of Alzheimer´s affected the family´s cohesion, satisfaction, and general functioning, in accordance with the family´s type and the caregiver.

Altitudinal zonation of rain forest on Bukit Belalong, Brunei: soils, forest structure and floristics

1997 ◽  
Vol 13 (2) ◽  
pp. 221-241 ◽  
Author(s):  
Colin A. Pendry ◽  
John Proctor
Keyword(s):  
Rain Forest ◽  
Basal Area ◽  
Tree Height ◽  
Montane Forest ◽  
Tree Density ◽  
Chemical Analyses ◽  
Lowland Rain Forest ◽  
Altitudinal Zonation ◽  
Maximum Tree Height ◽  
Number Of Individuals

ABSTRACTBukit Belalong, Brunei, is a small mountain (913 m) of uniform shale lithology with continuous primary rain forest from its base to its summit. Three 0.25 ha plots were established at each of three altitudes (200, 500 and 850 m) to investigate the altitudinal zonation of the soils and the vegetation. One soil profile from each altitude is described and chemical analyses of the soils indicate that they are similar at all altitudes. In each plot all trees ≥10 cm dbh were measured and identified as far as possible. Maximum tree height was greatest at 200 m (60 m) and least at 850 m (33 m). Tree density (number of individuals ha−1) increased with altitude. The forest at 850 m was the most species- and family-rich, but since the ratio of species to individuals did not vary significantly among altitudes, the higher species richness is attributed partly to the larger number of trees sampled. The Dipterocarpaceae was the most important family in terms of basal area at all altitudes, but its proportion of basal area was much smaller at 850 m than at the other altitudes. The Dipterocarpaceae was the most diverse family at 200 m and 500 m, but at 850 m its diversity was exceeded by the Lauraceae, Myrtaceae and Euphorbiaceae and equalled by the Clusiaceae. The forests at 200 m and 500 m are classified as lowland rain forest and that at 850 m is classified as a lower montane forest.

scholarly journals Structure and dynamics of stands of primeval character composed of the little-leaf linden (Tilia cordata Mill.) in the “Las lipowy Obrożyska” reserve (southernPoland)

2012 ◽  
Vol 51 (No. 7) ◽  
pp. 283-304 ◽  
Author(s):  
A. Jaworski ◽  
Z. Kołodziej ◽  
L. Bartkowicz
Keyword(s):  
Basal Area ◽  
Tilia Cordata ◽  
Growing Up ◽  
Stand Volume ◽  
Permanent Sample Plots ◽  
Atlantic Period ◽  
Structure And Dynamics ◽  
The Carpathians ◽  
Structure Phase

The little-leaf linden stand, investigated in this study, is a relict of the Atlantic period. On three permanent sample plots, situated in a strictly protected reserve, trees were measured and classed in 1990 and 2000. Stands in these areas represented the growing up stage in transition to the optimum stage (Obrożyska 1), the optimum stage (Obrożyska 2), and the growing up stage, the selection structure phase (Obrożyska 3). In 2000 the percentage of linden by volume was 97% in Obrożyska 1 and 2, and 77% in Obrożyska 3, while the stand volume was 768, 861, and 761 m<sup>3</sup>/ha, and basal area 60, 62, and 55 m<sup>2</sup>/ha,respectively. These stands have the highest per hectare volume among stands of primeval character in the Polish part of the Carpathians.

scholarly journals A review of the family Sphaeronectidae (Class Hydrozoa, Order Siphonophora), with the description of three new species

Zootaxa ◽  
2009 ◽  
Vol 2147 (1) ◽  
pp. 1-48 ◽  
Author(s):  
P. R. PUGH
Keyword(s):  
New Species ◽  
Systematic Position ◽  
The Other ◽  
The Past ◽  
The Family ◽  
The Status ◽  
Molecular Phylogenetic ◽  
Single Genus ◽  
Three New Species ◽  
Molecular Phylogenetic Data

The last reviewer of the family Sphaeronectidae (Siphonophora, Calycophorae) (Carré, 1968c) considered that it consisted of a single genus, Sphaeronectes, containing five species; three of which had been recently described by himself. For the other two species there had been much nomenclatural confusion in the past, as is herein reviewed. It is considered that for one of these species the name Sphaeronectes koellikeri Huxley (1859) has priority over the name currently in usage, that is S. gracilis (Claus, 1873; 1874). In addition the status of S. brevitruncata (Chun, 1888) is reconsidered and the species considered valid, with S. japonica (Stepanjants, 1967) being considered as a likely junior synonym of it. Three new Sphaeronectes species, S. christiansonae sp. nov., S. haddocki sp. nov. and S. tiburonae sp. nov., are described, and the systematic position of the genus reconsidered in the light of preliminary molecular phylogenetic data.

scholarly journals Neodendryphiella, a novel genus of the Dictyosporiaceae (Pleosporales)

MycoKeys ◽  
2018 ◽  
Vol 37 ◽  
pp. 19-38 ◽  
Author(s):  
Isabel Iturrieta-González ◽  
Josepa Gené ◽  
Josep Guarro ◽  
Rafael F. Castañeda-Ruiz ◽  
Dania García
Keyword(s):  
Morphological Analysis ◽  
Phylogenetic Analyses ◽  
The Other ◽  
The Novel ◽  
Novel Genus ◽  
Monophyletic Lineage ◽  
The Family ◽  
Three New Species ◽  
Branched Chains ◽  
Reference Strains

In a survey of soil and herbivore dung microfungi in Mexico and Spain, several dendryphiella-like species were found. Phylogenetic analyses based on ITS and LSU sequences showed that these fungi belonged to the family Dictyosporiaceae (Pleosporales) and represent an undescribed monophyletic lineage distant fromDendryphiella. Therefore, the genusNeodendryphiellais proposed to accommodate three new species,N.mali,N.michoacanensisandN.tarraconensis. The novel genus shares morphological features withDendryphiellasuch as differentiated conidiophores and polytretic integrated conidiogenous cells, that produce acropetal branched chains of conidia.Neodendryphielladiffers in the absence of nodulose conidiophores bearing conidiogenous cells with pores surrounded by a thickened and darkened wall, typical features in the conidiogenous apparatus ofDendryphiella. In addition, the phylogenetic and morphological analysis of several reference strains of differentDendryphiellaspecies, available for comparison, support the proposal ofD.variabilissp. nov., which mainly differs from the other species of the genus by having conidia up to 7 septa and highlight thatD.vinosaandD.infuscansare obscure species that require further taxonomic review.

scholarly journals Neodendryphiella, a novel genus of the Dictyosporiaceae (Pleosporales)

MycoKeys ◽  
2018 ◽  
Vol 37 ◽  
pp. 19-38
Author(s):  
Isabel Iturrieta-González ◽  
Josepa Gené ◽  
Josep Guarro ◽  
Rafael F. Castañeda-Ruiz ◽  
Dania García
Keyword(s):  
Morphological Analysis ◽  
Phylogenetic Analyses ◽  
The Other ◽  
The Novel ◽  
Novel Genus ◽  
Monophyletic Lineage ◽  
The Family ◽  
Three New Species ◽  
Branched Chains ◽  
Reference Strains

In a survey of soil and herbivore dung microfungi in Mexico and Spain, several dendryphiella-like species were found. Phylogenetic analyses based on ITS and LSU sequences showed that these fungi belonged to the family Dictyosporiaceae (Pleosporales) and represent an undescribed monophyletic lineage distant fromDendryphiella. Therefore, the genusNeodendryphiellais proposed to accommodate three new species,N.mali,N.michoacanensisandN.tarraconensis. The novel genus shares morphological features withDendryphiellasuch as differentiated conidiophores and polytretic integrated conidiogenous cells, that produce acropetal branched chains of conidia.Neodendryphielladiffers in the absence of nodulose conidiophores bearing conidiogenous cells with pores surrounded by a thickened and darkened wall, typical features in the conidiogenous apparatus ofDendryphiella. In addition, the phylogenetic and morphological analysis of several reference strains of differentDendryphiellaspecies, available for comparison, support the proposal ofD.variabilissp. nov., which mainly differs from the other species of the genus by having conidia up to 7 septa and highlight thatD.vinosaandD.infuscansare obscure species that require further taxonomic review.

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