Reduced-impact logging and temporal activity of understorey bats in lowland Amazonia

2009 ◽  
Vol 142 (10) ◽  
pp. 2131-2139 ◽  
Author(s):  
Ivan Castro-Arellano ◽  
Steven J. Presley ◽  
Michael R. Willig ◽  
Joseph M. Wunderle ◽  
Luiz N. Saldanha
2007 ◽  
Vol 138 (1-2) ◽  
pp. 269-285 ◽  
Author(s):  
Ivan Castro-Arellano ◽  
Steven J. Presley ◽  
Luis Nelio Saldanha ◽  
Michael R. Willig ◽  
Joseph M. Wunderle

Biotropica ◽  
2009 ◽  
Vol 41 (3) ◽  
pp. 369-378 ◽  
Author(s):  
Steven J. Presley ◽  
Michael R. Willig ◽  
Luiz N. Saldanha ◽  
Joseph M. Wunderle Jr ◽  
Ivan Castro-Arellano

2018 ◽  
Vol 15 (1) ◽  
pp. 279-295 ◽  
Author(s):  
Corina Buendía ◽  
Axel Kleidon ◽  
Stefano Manzoni ◽  
Björn Reu ◽  
Amilcare Porporato

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.


Author(s):  
Denis Silva Nogueira ◽  
Lenize Batista Calvão ◽  
Luciano Fogaça de Assis Montag ◽  
Leandro Juen ◽  
Paulo De Marco

1993 ◽  
Vol 7 (4) ◽  
pp. 755-757 ◽  
Author(s):  
Francis E. Putz ◽  
Michelle A. Pinard

Biotropica ◽  
2018 ◽  
Vol 50 (5) ◽  
pp. 758-767 ◽  
Author(s):  
Pablo Pérez Chaves ◽  
Kalle Ruokolainen ◽  
Hanna Tuomisto

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 ◽  
...  

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.


2006 ◽  
Vol 232 (1-3) ◽  
pp. 26-35 ◽  
Author(s):  
Claudia Azevedo-Ramos ◽  
Oswaldo de Carvalho ◽  
Benedito D. do Amaral

Author(s):  
Motohiro Hasegawa ◽  
Arthur Y. C. Chung ◽  
Tomohiro Yoshida ◽  
Tsutomu Hattori ◽  
Masahiro Sueyoshi ◽  
...  

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