Short-term Dynamics and the Effects of Biotic and Abiotic Factors on Plant Physiognomic Groups in a Hurricane-impacted Lower Montane Tropical Forest

Biotropica ◽  
2016 ◽  
Vol 48 (3) ◽  
pp. 332-341 ◽  
Author(s):  
Denneko Luke ◽  
Kurt McLaren ◽  
Byron Wilson
Keyword(s):  
Tropical Forest ◽  
Abiotic Factors ◽  
Short Term ◽  
Biotic And Abiotic Factors ◽  
Montane Tropical Forest

scholarly journals How bamboo influences the seed bank and biotic and abiotic factors of a Brazilian tropical forest

2021 ◽  
Vol 35 (2) ◽  
pp. 179-187
Author(s):  
Débora Cristina Rother ◽  
Paula Ponteli Costa ◽  
Thaís Diniz Silva ◽  
Karinne Sampaio Valdemarin ◽  
Ricardo Ribeiro Rodrigues
Keyword(s):  
Tropical Forest ◽  
Seed Bank ◽  
Abiotic Factors ◽  
Biotic And Abiotic Factors

scholarly journals Regional and local determinants of drought resilience in tropical forests

2021 ◽  
Author(s):  
Renan Köpp Hollunder ◽  
Mário Garbin ◽  
Fabio Rubio Scarano ◽  
Pierre Mariotte
Keyword(s):  
Tropical Forest ◽  
Tropical Forests ◽  
Vegetation Structure ◽  
Plant Traits ◽  
Forest Type ◽  
Abiotic Factors ◽  
Future Climate Change ◽  
Biotic And Abiotic Factors ◽  
Drought Resilience ◽  
Dry Tropical Forests

The increase in severity of droughts associated with greater mortality and reduced vegetation growth is one of the main threats to tropical forests. Drought resilience of tropical forests is affected by multiple biotic and abiotic factors varying at different scales. Identifying those factors can help understanding the resilience to ongoing and future climate change. Altitude leads to high climate variation and to different forest formations, principally moist or dry tropical forests with contrasted vegetation structure. Each tropical forest can show distinct responses to droughts. Locally, topography is also a key factor controlling biotic and abiotic factors related to drought resilience in each forest type. Both dry tropical forests and ridges (steeper and drier habitats) are more sensitive to droughts than moist tropical forest and valleys (flatter and wetter habitats). The most important biotic factors are leaf economic and hydraulic plant traits, and vegetation structure. The most important abiotic factors are soil nutrients, water availability and microclimate. Here we show that topography has key roles controlling biotic and abiotic factors in each forest type. Our synthesis highlights that gradients of altitude and topography are essential to understand tropical forest’s resilience to future drought events. We described important factors related to drought resilience, however many important knowledge gaps remain. Filling those gaps will help improve future practices and studies about mitigation capacity, conservation, and restoration of tropical ecosystems.

BIOLOGICAL CONTROL OF GREENHOUSE WHITEFLY, TRIALEURODES VAPORARIORUM (ALEYRODIDAE: HOMOPTERA), ON SHORT-TERM CROPS BY MANIPULATING BIOTIC AND ABIOTIC FACTORS

1974 ◽  
Vol 106 (11) ◽  
pp. 1175-1188 ◽  
Author(s):  
Robert G. Helgesen ◽  
Maurice J. Tauber
Keyword(s):  
Crop Production ◽  
Abiotic Factors ◽  
Trialeurodes Vaporariorum ◽  
Encarsia Formosa ◽  
Critical Factors ◽  
Short Term ◽  
Greenhouse Whitefly ◽  
Biotic And Abiotic Factors ◽  
Average Temperature ◽  
Crop Harvest

AbstractParasitized and unparasitized whitefly populations were sampled on a short-term crop (poinsettia) at 4–7 day intervals until crop harvest. Age-specific whitefly survivorship and parasite activity were evaluated in relation to various biotic and abiotic factors. Three critical factors influenced the outcome of the whitefly–Encarsia formosa interaction during short-term crop production. Commercially acceptable levels of control were achieved on poinsettia by (a) introducing parasites during the first 40 days of crop production, as pupae, when small scales were abundant, (b) introducing sufficient parasite pupae to develop a ratio of one adult parasite for every 30 large whitefly scales, and (c) maintaining an average temperature of 23.3 °C (74°F).

scholarly journals Changes in Phylogenetic Community Structure of the Seedling Layer Following Hurricane Disturbance in a Human-Impacted Tropical Forest

Forests ◽  
2018 ◽  
Vol 9 (9) ◽  
pp. 556 ◽  
Author(s):  
Liza Comita ◽  
María Uriarte ◽  
Jimena Forero-Montaña ◽  
W. Kress ◽  
Nathan Swenson ◽  
...  
Keyword(s):  
Land Use ◽  
Community Structure ◽  
Tropical Forest ◽  
Abiotic Factors ◽  
Seed Mass ◽  
Natural Disturbance ◽  
Forest Recovery ◽  
Phylogenetic Relatedness ◽  
Biotic And Abiotic Factors ◽  
Palm Species

Disturbance plays a key role in shaping forest composition and diversity. We used a community phylogeny and long-term forest dynamics data to investigate biotic and abiotic factors shaping tropical forest regeneration following both human and natural disturbance. Specifically, we examined shifts in seedling phylogenetic and functional (i.e., seed mass) community structure over a decade following a major hurricane in a human-impacted forest in Puerto Rico. Phylogenetic relatedness of the seedling community decreased in the first five years post-hurricane and then increased, largely driven by changes in the abundance of a common palm species. Functional structure (based on seed mass) became increasingly clustered through time, due to canopy closure causing small-seeded, light-demanding species to decline in abundance. Seedling neighbor density and phylogenetic relatedness negatively affected seedling survival, which likely acted to reduce phylogenetic relatedness within seedling plots. Across the study site, areas impacted in the past by high-intensity land use had lower or similar phylogenetic relatedness of seedling communities than low-intensity past land use areas, reflecting interactive effects of human and natural disturbance. Our study demonstrates how phylogenetic and functional information offer insights into the role of biotic and abiotic factors structuring forest recovery following disturbance.

scholarly journals The Effects of Biotic and Abiotic Factors on the Community Dynamics in a Mountain Subtropical Forest

Forests ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 427
Author(s):  
Tianyang Zhou ◽  
Jiaxin Zhang ◽  
Yunzhi Qin ◽  
Mingxi Jiang ◽  
Xiujuan Qiao
Keyword(s):  
Climate Change ◽  
Ecosystem Services ◽  
Forest Dynamics ◽  
Community Dynamics ◽  
Abiotic Factors ◽  
Subtropical Forest ◽  
Above Ground Biomass ◽  
Short Term ◽  
Forest Ecosystem Services ◽  
Number Of Individuals

From supporting wood production to mitigating climate change, forest ecosystem services are crucial to the well-being of humans. Understanding the mechanisms that drive forest dynamics can help us infer how to maintain forest ecosystem services and how to improve predictions of forest dynamics under climate change. Despite the growing number of studies exploring above ground biomass (AGB) dynamics, questions of dynamics in biodiversity and in number of individuals still remain unclear. Here, we first explored the patterns of community dynamics in different aspects (i.e., AGB, density and biodiversity) based on short-term (five years) data from a 25-ha permanent plot in a subtropical forest in central China. Second, we examined the relationships between community dynamics and biodiversity and functional traits. Third, we identified the key factors affecting different aspects of community dynamics and quantified their relative contributions. We found that in the short term (five years), net above ground biomass change (ΔAGB) and biodiversity increased, while the number of individuals decreased. Resource-conservation traits enhanced the ΔAGB and reduced the loss in individuals, while the resource-acquisition traits had the opposite effect. Furthermore, the community structure contributed the most to ΔAGB; topographic variables and soil nutrients contributed the most to the number of individuals; demographic process contributed the most to biodiversity. Our results indicate that biotic factors mostly affected the community dynamics of ΔAGB and biodiversity, while the number of individuals was mainly shaped by abiotic factors. Our work highlighted that the factors influencing different aspects of community dynamics vary. Therefore, forest management practices should be formulated according to a specific protective purpose.

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