scholarly journals Effect of Seasonal Rains and Floods on Seedling Recruitment and Compositional Similarity in Two Lowland Tropical Forests

Forests ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 1297
Author(s):  
Brayan S. Polanía ◽  
Ana M. Aldana ◽  
Marius Bottin ◽  
Diana M. Cruz ◽  
Francisco Castro-Lima ◽  
...  
Keyword(s):  
Plant Species ◽  
Rainy Season ◽  
Seedling Recruitment ◽  
Sampling Site ◽  
Terra Firme ◽  
Precipitation Regime ◽  
Flooded Forest ◽  
Tree Community ◽  
Terra Firme Forest ◽  
Seasonally Flooded

Research Highlights: Seasonally flooded and terra firme forests are characteristic ecosystems of the Colombian Orinoco Basin and of great importance in the maintenance of regional biodiversity and ecosystem function. These forests have a unimodal precipitation regime that can cause a temporal effect on the seedling regeneration niche. This could partly explain the high diversity and coexistence of plant species in these forests, as well as the similarity in composition of seedlings and trees. Background and Objectives: Seedlings are a key factor in the assembly of plant communities. We evaluated the effect of flooding and rains on the dissimilarity and compositional affinity between trees and seedlings of seasonally flooded and terra firme forests. Materials and Methods: the tree community of these forests in San Martín (Meta, Colombia) was characterized and compared with their respective seedling communities before (June) and after (December) rain and flooding (during the rainy season). We evaluated plant species diversity and abundance (Shannon diversity and Pielou eveness index), as well as the compositional dissimilarities of each tree community with their corresponding seedling community sampled at the beginning and end of rains and flooding (Bray–Curtis dissimilarity). We also compared sampling site composition using a NMDS analysis. Results: We found that the terra firme forest had higher diversity compared to the flooded forest. Seedling density in the seasonally flooded forest decreased significantly after the flood but not in the terra firme forest at the end of the rainy season. The compositional dissimilarity between trees and seedlings in the seasonally inundated forest also decreased after the flood. However, this pattern was not evident in the terra firme forest. Conclusions: These results indicate that seasonal flooding generates a strong ecological filter that affects the realized niche of plants in these forests. Our results can contribute valuable information for the effective development of assisted restoration and conservation programs.

scholarly journals Estructura y composición florística arbórea en dos tipos de bosque en la Zona de Amortiguamiento, Reserva Nacional de Tambopata

Q'EUÑA ◽  
2019 ◽  
Vol 8 (1) ◽  
pp. 39-50
Author(s):  
Sufer Marcial Baez Quispe ◽  
Jorge Santiago Garate Quispe
Keyword(s):  
Species Diversity ◽  
Floristic Composition ◽  
Forest Types ◽  
Terra Firme ◽  
Important Family ◽  
Flooded Forest ◽  
Madre De Dios ◽  
Terra Firme Forest ◽  
Socratea Exorrhiza ◽  
Tierra Firme

Resumén Se presenta un análisis y comparación de la diversidad, estructura y composición florística de dos tipos de bosque (de tierra firme e inundable) en dos concesiones de conservación en la Zona de Amortiguamiento de la Reserva Nacional Tambopata (Madre de Dios, Perú). Se instalaron 2 parcelas de 10 m x 500 m (0,5 ha) por tipo de bosque, donde se inventarió todos los individuos con un diámetro a la altura del pecho (DAP) ≥ 10 cm. Se realizó la caracterización estructural de ambos tipos de bosque, se calculó la diversidad en ellos y se estudió la similitud entre ellos. Los resultados sugieren diferencias entre los dos tipos de bosque en términos de abundancia, dominancia, estructura y composición florística de acuerdo con otros estudios en la Amazonia. La diversidad de especies fue alta en el bosque de tierra firme (α-Fischer 84,4–57,4 y H' 4,0–4,5) y baja en el bosque inundable (α-Fischer 39.9 – 42.4, H' 3.3 – 3.4). Arecaceae fue la familia más importante en los bosques inundables, mientras que Moraceae fue la familia más importante en los bosques de tierra firme. Ficus gomelleira, Pterocarpus amazonum, Hevea guianensis, y Socratea exorrhiza fueron las especies más importantes en los bosques de tierra firme, mientras que Iriartea deltoidea, Otoba parvifolia y Pseudolmedia laevis, fueron las más importantes en los bosques inundables. La composición florística fue diferente entre los dos tipos de bosque, con 19,3 % de similitud en promedio (distancia de Bray-Curtis). Nuestros resultados coinciden con los obtenidos en otras investigaciones para la Amazonía Peruana. AbstractThe aim of this study was to compare and analyze the diversity, structure and floristic composition of two forest types at buffer zone of the Tambopata National Reserve (Madre de Dios). Two plots per forest types of 10 m x 500 m (0.5 ha) were used, where all individuals with a diameter at the breast height DBH ≥ 10 cm were inventoried. The total height (HT) and DBH of all tree individuals were measured. In the structural analysis, DBH size classes, density, dominance, and the importance index were calculated. We calculated the Shannon-Weaver index, α-Fischer index, and Bray-Curtis distance to evaluate the species diversity and similarity between the two forest types. The results suggest differences between forest types in terms of abundance, dominance, structure and floristic composition in agreement with other studies in the Amazonia. The species diversity is higher the terra firme forest (α-Fischer 84.4–57.4 y H' 4.0–4.5) than in the flooded forest (α-Fischer 39.9 – 42.4 y H' 3.3 – 3.4). The Arecaceae was the most important family in the flooded forest while the Moraceae was the most important family in terra firme forest. Ficus gomelleira, Pterocarpus amazonum, Hevea guianensis, and Socratea exorrhiza were the most important species in terra firme 

scholarly journals Structure and Composition of Terra Firme and Seasonally Flooded Várzea Forests in the Western Brazilian Amazon

Forests ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 1361
Author(s):  
Yennie K. Bredin ◽  
Joseph E. Hawes ◽  
Carlos A. Peres ◽  
Torbjørn Haugaasen
Keyword(s):  
Species Composition ◽  
Woody Plant ◽  
Forest Type ◽  
Brazilian Amazon ◽  
Floodplain Forests ◽  
Forest Types ◽  
Terra Firme ◽  
Flooded Forests ◽  
Terra Firme Forest ◽  
Seasonally Flooded

Research Highlights: Rare, or sparsely distributed, species drive the floristic diversity of upland, terra firme and seasonally flooded forests in the central Juruá—a remote and hitherto floristically poorly known area in the Brazilian Amazon. Background and Objectives: Floristic inventories are critical for modelling and understanding the role of Amazonian forests in climate regulation, for sustainable management of forest resources and efficient conservation planning. Yet, detailed information about the often complex spatial distributions of many Amazonian woody plants is limited. Here, we provide information about forest structure and species composition from a remote terra firme forest and an adjacent floodplain forest in the western Brazilian Amazon. More specifically, we ask (1) how floristically different are the terra firme and floodplain forests? and (2) how variable is species composition within the same forest type? Materials and Methods: Between September 2016 and October 2017, we inventoried 97 plots (each 0.1 ha; 100 × 10 m) placed at least 800 m apart, with 46 plots in terra firme forest and 51 in seasonally flooded forest. We included all trees, hemi-epiphytes and palms with diameter at breast height (dbh) > 10 cm and woody lianas > 5 cm dbh. We examine forest structure, family- and species-level floristic composition and species diversity within and between forest types using family and species importance values, rarefaction curves and dissimilarity matrices. Results: Terra firme forest and seasonally flooded forest woody plant communities differ both in structure and species composition, which was highly variable within forest types. Many species were shared between terra firme and seasonally flooded forests, but most species were forest type-specific. Whereas species richness was greatest in the terra firme forest, floodplain species richness was among the highest regionally. Conclusions: Floodplain forests are a crucial complement to terra firme forests in terms of Amazonian woody plant diversity.

scholarly journals Arthropoda, Arachnida, Scorpiones: Estação Científica Ferreira Penna and Juruti Plateau, Pará, Brazil

Check List ◽  
2007 ◽  
Vol 3 (2) ◽  
pp. 143
Author(s):  
Ricardo Pinto-da-Rocha ◽  
Cleiton Oliveira de Araújo ◽  
José Augusto Pereira Barreiros ◽  
Alexandre Bragio Bonaldo
Keyword(s):  
Relative Abundance ◽  
New Records ◽  
Pitfall Traps ◽  
Terra Firme ◽  
Flooded Forest ◽  
Terra Firme Forest

Six scorpion species were recorded using pitfall traps with drift-fences in the Amazonian terra firme forest of Estação Científica Ferreira Penna, Floresta Nacional de Caxiuanã, Melgaço, Pará, Brazil, during four expeditions in 2003: Brotheas sp. (relative abundance 0.6); Broteochactas parvulus Pocock, 1897 (0.22), Tityus paraensis Kraepelin, 1896 (0.06); Tityus silvestris Pocock, 1897 (0.04); Ananteris balzanii Thorell, 1891 (0.04) and Tityus strandi Werner, 1939 (0.02). Abundance in the non-flooded forest is higher than the flooded forest probably due to the availability of dry shelters. Five new records are presented for the Juruti Plateau, Pará: buthids Tityus metuendus Pocock, 1897, T. silvestris Pocock, 1897, T. strandi Werner, 1939; chactids Brotheas overali Lourenço, 1988, and Broteochactas parvulus Pocock, 1897.

scholarly journals Macrophytes of the lowland wetlands in Morang district, Nepal

2013 ◽  
Vol 1 ◽  
pp. 131-139 ◽  
Author(s):  
Umesh Koirala ◽  
Sasinath Jha
Keyword(s):  
Plant Species ◽  
Rainy Season ◽  
Life Form ◽  
Summer Season ◽  
Rural People

In total, 149 species of macrophytes (angiosperms 138, pteridophytes 7, bryophytes 2, algae 2) were recorded among which 117 species were emergent, 12 floating-leafed, 14 submerged and 6 free-floating on the basis of life form. In general, 68% species had flowering-fruiting during the rainy season, 17% in winter and 15% in the summer season. Many of the plant species were observed to play important role in meeting day to day requirements of the rural people. DOI: http://dx.doi.org/10.3126/njbs.v1i0.7480 Nepalese Journal of Biosciences 1: 131-139 (2011)

scholarly journals Marked Differences in Butterfly Assemblage Composition between Forest Types in Central Amazonia, Brazil

Forests ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 942
Author(s):  
Isabela Freitas Oliveira ◽  
Fabricio Beggiato Baccaro ◽  
Fernanda P. Werneck ◽  
Thamara Zacca ◽  
Torbjørn Haugaasen
Keyword(s):  
Species Richness ◽  
Forest Type ◽  
Spatial Arrangement ◽  
High Water ◽  
Butterfly Species ◽  
Terra Firme ◽  
Central Amazonia ◽  
Forested Areas ◽  
Contrasting Habitats ◽  
Seasonally Flooded

Amazonia comprises a mosaic of contrasting habitats, with wide environmental heterogeneity at local and regional scales. In central Amazonia, upland forest (terra firme) is the predominant forest type and seasonally flooded forests inundated by white- and black-water rivers (várzea and igapó, respectively) represent around 20% of the forested areas. In this work, we took advantage of a natural spatial arrangement of the main vegetation types in central Amazonia to investigate butterfly assemblage structure in terra firme, várzea and igapó forests at the local scale. We sampled in the low- and high-water seasons, combining active and passive sampling with traps placed in both the understory and canopy. Terra firme supported the highest number of butterfly species, whereas várzea forest provided the highest number of butterfly captures. The high species richness in terra firme may reflect that this forest type is floristically richer than várzea and igapó. Várzea is a very productive environment and may thus support a higher number of butterfly individuals than terra firme and igapó. Most butterfly species (80.2%) were unique to a single forest type and 17 can be considered forest type indicator species in this landscape. Floodplain forest environments are therefore an important complement to terra firme in terms of butterfly species richness and conservation in Amazonia.

Nitrogen cycling in a Venezuelan tropical seasonally flooded forest: soil nitrogen mineralization and nitrification

1994 ◽  
Vol 10 (3) ◽  
pp. 399-416 ◽  
Author(s):  
Barrios E. ◽  
Herrera R.
Keyword(s):  
Soil Nitrogen ◽  
Nitrogen Availability ◽  
Inorganic Nitrogen ◽  
Nitrogen Concentration ◽  
Ammonium Nitrogen ◽  
Wet Season ◽  
Flooded Forest ◽  
Nitrogen Concentrations ◽  
Minimum Stress ◽  
Seasonally Flooded

ABSTRACTSeasonally flooded forests represent a transition between terrestrial and aquatic ecosystems. The Mapire river, a tributary of the Orinoco river, floods its surrounding forests during the wet season (May–December). The soils are very acid and the total nitrogen concentration (0.1%) is only half that found in nearby soils flooded by Orinoco waters. Ammonium-nitrogen predominates in the soil during the flooded period while nitrate-nitrogen concentrations are higher in the dry period. Wide fluctuations in the inorganic nitrogen fractions did not considerably affect the annual course of soil nitrogen.The predominance of mineralization versus nitrification (56 and 5 μgsoil month−1respectively) and possibly the synchronization of nitrogen availability with plant demand could be considered as nitrogen conserving mechanisms.In synchrony with the hydrologic cycle, the seasonally flooded forest studied shows a nitrogencycle where inputs and accumulation are maximized when the system is under minimum stress (dry season). During flooding, the system enters a period of dormancy making minimal use of nutrient and energy to avoid or tolerate anaerobiosis.

Arbuscular mycorrhizal fungal communities along a pedo-hydrological gradient in a Central Amazonian terra firme forest

Mycorrhiza ◽  
2013 ◽  
Vol 24 (1) ◽  
pp. 21-32 ◽  
Author(s):  
Rejane de Oliveira Freitas ◽  
Erika Buscardo ◽  
Laszlo Nagy ◽  
Alex Bruno dos Santos Maciel ◽  
Rosilaine Carrenho ◽  
...  
Keyword(s):  
Arbuscular Mycorrhizal ◽  
Fungal Communities ◽  
Terra Firme ◽  
Terra Firme Forest ◽  
Arbuscular Mycorrhizal Fungal

scholarly journals Evaluating the effect of nutrient redistribution by animals on the phosphorus cycle of lowland Amazonia

2018 ◽  
Vol 15 (1) ◽  
pp. 279-295 ◽  
Author(s):  
Corina Buendía ◽  
Axel Kleidon ◽  
Stefano Manzoni ◽  
Björn Reu ◽  
Amilcare Porporato
Keyword(s):  
Amazon Basin ◽  
P Availability ◽  
Phosphorus Cycle ◽  
Terra Firme ◽  
The Andes ◽  
P Content ◽  
Spatial Redistribution ◽  
Soil Age ◽  
Seasonally Flooded ◽  
Lowland Amazonia

Abstract. Phosphorus (P) availability decreases with soil age and potentially limits the productivity of ecosystems growing on old and weathered soils. Despite growing on ancient soils, ecosystems of lowland Amazonia are highly productive and are among the most biodiverse on Earth. P eroded and weathered in the Andes is transported by the rivers and deposited in floodplains of the lowland Amazon basin creating hotspots of P fertility. We hypothesize that animals feeding on vegetation and detritus in these hotspots may redistribute P to P-depleted areas, thus contributing to dissipate the P gradient across the landscape. Using a mathematical model, we show that animal-driven spatial redistribution of P from rivers to land and from seasonally flooded to terra firme (upland) ecosystems may sustain the P cycle of Amazonian lowlands. Our results show how P imported to land by terrestrial piscivores in combination with spatial redistribution of herbivores and detritivores can significantly enhance the P content in terra firme ecosystems, thereby highlighting the importance of food webs for the biogeochemical cycling of Amazonia.

Sign in / Sign up

Export Citation Format

Share Document