Physiognomy and structure of a seasonal deciduous forest on the Ibiapaba plateau, Ceará, Brazil

Abstract The Brazilian semiarid region is dominated by caatinga. However, other vegetation formations occur, including deciduous and semi-deciduous forests. This study describes physiognomy and structure of a forest on the sedimentary Ibiapaba plateau. All plants within one hectare were separated into three components: woody plants with perimeter at soil level (PSL) ≥ 9 cm (WCLP), woody plants with PSL ≥ 3 and ≤ 8.9 cm (WCSP), and herb/subwoody plants (HSwC). WCLP included 88 species (33 families), WCSP 50 species (23 families) and HSwC only 7 species (5 families). Total density, basal area, and maximum and average height of WCLP were 5683 plants/ha, 47 m2/ha, 18 and 5 m respectively. Total density and basal area of WCSP were 17500 plants/ha and 2.8 m2/ha, respectively. Density of HSwC was 9 plants/m2 and only 31% of the sampled area was occupied by this component.

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Trends in Tree Diversity and Stand Structure during Restoration: A Case Study in Fragmented Moist Deciduous Forest Ecosystems of Northeast India

Journal of Ecosystems ◽

10.1155/2014/845142 ◽

2014 ◽

Vol 2014 ◽

pp. 1-10 ◽

Cited By ~ 2

Author(s):

Koushik Majumdar ◽

Uma Shankar ◽

Badal Kumar Datta

Keyword(s):

Woody Plants ◽

Stand Structure ◽

Deciduous Forest ◽

Basal Area ◽

Northeast India ◽

Deciduous Forests ◽

Important Species ◽

Local Plant ◽

Fragmented Forests ◽

Girth Class

Ecological implications for the conservation of fragmented forests to managed local plant diversity have recently drawn much attention of most conservationists. Present study investigates the importance of fragmented forests using different quantitative measures of species diversity and stand structure as indicators of natural restoration from past disturbances. Eleven independent 500 m × 10 m belt transects (5.5 ha) were established within fragmented low land moist deciduous forests of Tripura. All woody plants ≥10 cm girth at breast height (GBH) were measured. A total of 7,134 individuals with mean density of 648.55 stems ha−1 and 16.36 m2 ha−1 of basal area were recorded, which represented 134 species, 93 genera, and 43 families of woody plants. Diversity-dominance curve showed that maximum number of species were ranked >10 due to low abundance value. Maximum distributions of stems (>50%) were recorded at lowest girth class (10–30 cm) as an indication of advanced regeneration and significantly declined towards upper girth (radj2=0.93; P<0.0001) and height (radj2=0.95; P<0.0001) classes, which also indicated that some plants were adopted with ongoing disturbances through both seeded and nonseeded regeneration. Species richness (radj2=0.49; P=0.05), dominance (radj2=0.68; P=0.009), and density (radj2=0.62; P=0.02) were significantly increased at different disturbance intensities. Disturbances strongly influenced typical community association and structure by increasing diversity and population at certain magnitude and thereby showed declining trend towards maturation. Fragmented moist deciduous forests seek immediate attention as they represent spatial habitat for many economical or ecological important species, thus sustaining local biodiversity for livelihoods.

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Coarse woody debris in an old-growth deciduous forest on the Cumberland Plateau, southeastern Kentucky

Canadian Journal of Forest Research ◽

10.1139/x91-218 ◽

1991 ◽

Vol 21 (11) ◽

pp. 1567-1572 ◽

Cited By ~ 75

Author(s):

Robert N. Muller ◽

Yan Liu

Keyword(s):

Coarse Woody Debris ◽

Total Mass ◽

Deciduous Forest ◽

Woody Debris ◽

Basal Area ◽

Deciduous Forests ◽

Cumberland Plateau ◽

Old Growth ◽

Regional Pattern ◽

Old Growth Forest

Volume and mass of coarse woody debris (> 20 cm diameter) in an old-growth forest on the Cumberland Plateau in southeastern Kentucky averaged 66.3 m3/ha and 21.8 Mg/ha, respectively. Coarse woody debris was patchily distributed among 80 sample plots (0.04 ha each), with 10 plots containing 39% of the total mass. Coarse woody debris mass was inversely, although not strongly, related to plot basal area. While 23 species contributed to the accumulation of coarse woody debris, five accounted for 72% of the total mass. These included Quercusprinus L. (25% of the total), Fagusgrandifolia L. (16%), Quercusalba L. (12%), Castaneadentata (Marsh.) Borkh. (11%), and Quercusvelutina Lam. (9%). The few studies of coarse woody debris in old-growth deciduous forests of North America suggest a regional pattern of accumulation correlated with temperature. In warmer regions, old-growth deciduous forests accumulate a mass in the range of 22–32 Mg/ha, while in cooler ecosystems, coarse woody debris ranges from 34 to 49 Mg/ha.

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Assessment of tree diversity in distinctive deciduous forests of Suruli falls, Southern Western Ghats

Journal of Applied and Natural Science ◽

10.31018/jans.v10i4.1879 ◽

2018 ◽

Vol 10 (4) ◽

pp. 1085-1093

Author(s):

J Naveenkumar ◽

Somaiah Sundarapandian

Keyword(s):

Species Richness ◽

Western Ghats ◽

Deciduous Forest ◽

Basal Area ◽

Deciduous Forests ◽

Stem Density ◽

Diameter Class ◽

Importance Value Index ◽

Importance Value ◽

Southern Western Ghats

A quantitative inventory was conducted in two distinctive tropical deciduous forests at Suruli falls forest of southern Western Ghats. Two one-hectare plots were established and all trees >10cm DBH measured. Species richness, density, family importance value (FIV) and importance value index (IVI) were calculated and the results varied among the two sites. A total of 777 stems and 52 species were documented in both the sites and moist deciduous forest (MDF) had maximum number species richness and density than dry deciduous forest (DDF). The basal area was higher in MDF (502 stems/ha and 16.52 m2/ha) than in DDF (275 stems/ha and 7.23 m2/ha). However, Shannon and evenness indices showed a negative trend (DDF- 2.62, 0.41 and MDF- 2.37, 0.27). Diameter class-wise distribution of trees showed reverse ‘J shaped’ curve in both the forest types. Pterocarpus marsupium was the mono-dominant species holding one-third of the IVI (113), 27% of the stem density and 30% of the total basal area. DDF site is suspected to recurrence of annual fire. Anogeissus latifolia and Strychnos potatorum were the fire-tolerant species only found in lower diameter class. The maximum species shared contiguous distribution in the deciduous forests. The observed variations in the tree community between the two deciduous forest sites are possibly due to variations in altitude, rainfall, temperature, past disturbance, fire and edaphic characteristics.

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Nitrogen Stocks in Soil Classes Under Different Land Uses in the Brazilian Semiarid Region

Journal of soil science and plant nutrition ◽

10.1007/s42729-021-00466-4 ◽

2021 ◽

Author(s):

Uemeson José dos Santos ◽

Everardo Valadares de Sá Barretto Sampaio ◽

Eunice Maia de Andrade ◽

Alexandre de Siqueira Pinto ◽

Bruno de Oliveira Dias ◽

...

Keyword(s):

Semiarid Region ◽

Land Uses ◽

Brazilian Semiarid

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Management of water supply systems from interbasin transfers: case study in the Brazilian semiarid region

Urban Water Journal ◽

10.1080/1573062x.2021.1925703 ◽

2021 ◽

pp. 1-12

Author(s):

José Almir Cirilo ◽

Alfredo Ribeiro Neto ◽

Nyadja Menezes Rodrigues Ramos ◽

Carla Fernanda Fortunato ◽

Júlia Daniele Silva de Souza ◽

...

Keyword(s):

Water Supply ◽

Semiarid Region ◽

Water Supply Systems ◽

Brazilian Semiarid ◽

Interbasin Transfers ◽

Supply Systems

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Spatial distribution and temporal variation of microcrustaceans assembly (Cladocera and Copepoda) in different compartments of a reservoir in the brazilian semiarid region

Acta Limnologica Brasiliensia ◽

10.1590/s2179-975x9616 ◽

2018 ◽

Vol 30 (0) ◽

Cited By ~ 1

Author(s):

Josiane Souza Santos ◽

Nadson Ressyé Simões ◽

Sérgio Luiz Sonoda

Keyword(s):

Spatial Distribution ◽

Spatial Variation ◽

Temporal Variation ◽

Aquatic Macrophytes ◽

Temporal Dynamics ◽

Lateral Compartment ◽

Spatial And Temporal Variation ◽

Semiarid Region ◽

Brazilian Semiarid ◽

Significant Spatial Variation

Abstract Aim: The objective of this study was to investigate the spatial and temporal variation of microcrustacean assemblages of a reservoir in the Brazilian semiarid region. Methods Physical and chemical water variables and samples of microcrustaceans were collected at eight sites of the reservoir between July 2013 and November 2014, in a total of seven campaigns. For this study, the reservoir was categorized in two compartments: lateral and central. Results Limnological variables showed significant temporal variation (PERMANOVA, Pseudo-F = 19.51, p = 0.001). Higher turbidity values and suspended solids were observed in the rainiest months, while during the dry months, we measured higher values of transparency, dissolved oxygen, and chlorophyll-a. It was not found significant spatial variation of limnological variables (PERMANOVA, Pseudo-F = 0.96; p = 0.394). During the study period, ten species were recorded: four Cladocera (Ceriodaphnia cornuta, Daphnia gessneri, Diaphanosoma birgei and Diaphanosoma spinulosum ) three Copepoda Calanoida (Argyrodiaptomus azevedoi, Notodiaptomus cearensis and Notodiaptomus iheringi) and three Copepoda Cyclopoida (Macrocyclops albidus, Thermocyclops minutus and Thermocyclops decipiens). The microcrustacean assemblages showed significant temporal variation (PERMANOVA, Pseudo-F = 4.34; p = 0.001) as well as significant spatial variation (PERMANOVA, Pseudo-F = 9.46; p = 0.001). The highest values of abundance and richness were observed in the lateral compartment, this result is mainly related to the presence of aquatic macrophytes in this region, because the analysis of partial RDA indicated that limnological variables explained only 11% of this variation (Pseudo-F = 2.08, p = 0.001). Conclusions The results suggest that the seasonality of the semiarid is an important factor in the temporal dynamics of the limnological variables, while the aquatic macrophytes play an important role in the spatial distribution of the microcrustacean assembly.

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