scholarly journals Long-term hurricane damage effects on tropical forest tree growth and mortality

Ecology ◽  
2014 ◽  
Vol 95 (10) ◽  
pp. 2974-2983 ◽  
Author(s):  
Edmund V. J. Tanner ◽  
Francisco Rodriguez-Sanchez ◽  
John R. Healey ◽  
Robert J. Holdaway ◽  
Peter J. Bellingham
Keyword(s):  
Tropical Forest ◽  
Tree Growth ◽  
Forest Tree ◽  
Hurricane Damage

scholarly journals Effects of selective logging on tropical forest tree growth

2008 ◽  
Vol 113 (G1) ◽  
pp. n/a-n/a ◽  
Author(s):  
Adelaine Michela e S. Figueira ◽  
Scott D. Miller ◽  
Cleilim Albert D. de Sousa ◽  
Mary C. Menton ◽  
Augusto R. Maia ◽  
...  
Keyword(s):  
Tropical Forest ◽  
Tree Growth ◽  
Forest Tree ◽  
Selective Logging

scholarly journals Growth-Climate Relationships and Long-Term Growth Trends of the Tropical Forest Tree Choerospondias axillaris (Anacardiaceous) in East-Central Thailand

Forests ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1655
Author(s):  
Wisawakorn Surayothee ◽  
Supaporn Buajan ◽  
Peili Fu ◽  
Nathsuda Pumijumnong ◽  
Zexin Fan ◽  
...  
Keyword(s):  
Tropical Forest ◽  
Tree Ring ◽  
Monsoon Season ◽  
Forest Tree ◽  
East Central ◽  
Tree Ring Analysis ◽  
Growth Trends ◽  
Ring Analysis ◽  
Central Thailand

Tropical forests play important roles in global carbon cycling. Tree-ring analysis can provide important information for understanding long-term trends in carbon-fixation capacity under climate change. However, tree-ring studies in tropical regions are limited. We carried out a tree-ring analysis to investigate the dendrochronological potential of the tropical forest tree Choerospondias axillaris (Anacardiaceae) in east-central Thailand. Our study focused on growth-climate relationships and long-term growth trends. A chronology was constructed covering the period from 1932 to 2019. The tree-ring width index of C.axillaris was positively correlated with precipitation in June, July, and October. Furthermore, growth of C.axillaris was positively correlated with the Standardized Precipitation-Evapotranspiration Index (SPEI) from July to October, indicating that growth of C.axillaris is mainly limited by moisture availability in the late monsoon season. Moving correlation analysis further revealed the consistency and temporal stability of the relationship of tree growth with monsoon season precipitation and SPEI during the period under study. There was a significant increasing trend in long-term growth from 1932 to 2002 (slope = 0.017, p < 0.001); however, long-term growth decreased from 2003 to 2019 (slope = −0.014, p < 0.001). Our study provides important insight into the growth-climate correlations of a broad-leaved tree species in a dry evergreen forest in tropical Asia.

scholarly journals Variability in solar radiation and temperature explains observed patterns and trends in tree growth rates across four tropical forests

2012 ◽  
Vol 279 (1744) ◽  
pp. 3923-3931 ◽  
Author(s):  
Shirley Xiaobi Dong ◽  
Stuart J. Davies ◽  
Peter S. Ashton ◽  
Sarayudh Bunyavejchewin ◽  
M. N. Nur Supardi ◽  
...  
Keyword(s):  
Solar Radiation ◽  
Tropical Forest ◽  
Temporal Variation ◽  
Tropical Forests ◽  
Tree Growth ◽  
Growth Rates ◽  
Global Climate ◽  
Night Time ◽  
Temperature And Precipitation

The response of tropical forests to global climate variability and change remains poorly understood. Results from long-term studies of permanent forest plots have reported different, and in some cases opposing trends in tropical forest dynamics. In this study, we examined changes in tree growth rates at four long-term permanent tropical forest research plots in relation to variation in solar radiation, temperature and precipitation. Temporal variation in the stand-level growth rates measured at five-year intervals was found to be positively correlated with variation in incoming solar radiation and negatively related to temporal variation in night-time temperatures. Taken alone, neither solar radiation variability nor the effects of night-time temperatures can account for the observed temporal variation in tree growth rates across sites, but when considered together, these two climate variables account for most of the observed temporal variability in tree growth rates. Further analysis indicates that the stand-level response is primarily driven by the responses of smaller-sized trees (less than 20 cm in diameter). The combined temperature and radiation responses identified in this study provide a potential explanation for the conflicting patterns in tree growth rates found in previous studies.

Update on the Boundaries of the Curly Birch Range

2020 ◽  
pp. 9-21
Author(s):  
L.V. Vetchinnikova ◽  
◽  
A.F. Titov ◽  
◽  
Keyword(s):  
Population Size ◽  
Natural Populations ◽  
Forest Tree ◽  
Published Data ◽  
Population Approach ◽  
Key Factors ◽  
History Of ◽  
Individual Trees ◽  
Karelian Birch

The article reports on the application of the best known principles for mapping natural populations of curly (Karelian) birch Betula pendula Roth var. carelica (Mercklin) Hämet-Ahti – one of the most appealing representatives of the forest tree flora. Relying on the synthesis and analysis of the published data amassed over nearly 100 years and the data from own full-scale studies done in the past few decades almost throughout the area where curly birch has grown naturally, it is concluded that its range outlined in the middle of the 20th century and since then hardly revised is outdated. The key factors and reasons necessitating its revision are specified. Herewith it is suggested that the range is delineated using the population approach, and the key element will be the critical population size below which the population is no longer viable in the long term. This approach implies that the boundaries of the taxon range depend on the boundaries of local populations (rather than the locations of individual trees or small clumps of trees), the size of which should not be lower than the critical value, which is supposed to be around 100–500 trees for curly birch. A schematic map of the curly birch range delineated using this approach is provided. We specially address the problem of determining the minimum population size to secure genetic diversity maintenance. The advantages of the population approach to delineating the distribution range of curly birch with regard to its biological features are highlighted. The authors argue that it enables a more accurate delineation of the range; shows the natural evolutionary history of the taxon (although it is not yet officially recognized as a species) and its range; can be relatively easily updated (e.g. depending on the scope of reintroduction); should be taken into account when working on the strategy of conservation and other actions designed to maintain and regenerate this unique representative of the forest tree flora.

scholarly journals Long-Term Nitrogen Addition Decreases Soil Carbon Mineralization in an N-Rich Primary Tropical Forest

Forests ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 734
Author(s):  
Xiankai Lu ◽  
Qinggong Mao ◽  
Zhuohang Wang ◽  
Taiki Mori ◽  
Jiangming Mo ◽  
...  
Keyword(s):  
Microbial Biomass ◽  
Organic Carbon ◽  
Tropical Forest ◽  
Soil Carbon ◽  
Tropical Forests ◽  
Carbon Mineralization ◽  
N Deposition ◽  
Soil Carbon Mineralization ◽  
N Additions

Anthropogenic elevated nitrogen (N) deposition has an accelerated terrestrial N cycle, shaping soil carbon dynamics and storage through altering soil organic carbon mineralization processes. However, it remains unclear how long-term high N deposition affects soil carbon mineralization in tropical forests. To address this question, we established a long-term N deposition experiment in an N-rich lowland tropical forest of Southern China with N additions such as NH4NO3 of 0 (Control), 50 (Low-N), 100 (Medium-N) and 150 (High-N) kg N ha−1 yr−1, and laboratory incubation experiment, used to explore the response of soil carbon mineralization to the N additions therein. The results showed that 15 years of N additions significantly decreased soil carbon mineralization rates. During the incubation period from the 14th day to 56th day, the average decreases in soil CO2 emission rates were 18%, 33% and 47% in the low-N, medium-N and high-N treatments, respectively, compared with the Control. These negative effects were primarily aroused by the reduced soil microbial biomass and modified microbial functions (e.g., a decrease in bacteria relative abundance), which could be attributed to N-addition-induced soil acidification and potential phosphorus limitation in this forest. We further found that N additions greatly increased soil-dissolved organic carbon (DOC), and there were significantly negative relationships between microbial biomass and soil DOC, indicating that microbial consumption on soil-soluble carbon pool may decrease. These results suggests that long-term N deposition can increase soil carbon stability and benefit carbon sequestration through decreased carbon mineralization in N-rich tropical forests. This study can help us understand how microbes control soil carbon cycling and carbon sink in the tropics under both elevated N deposition and carbon dioxide in the future.

A case of gender equality: absence of sex-related costs in a dioecious tropical forest tree species

Plant Ecology ◽  
2021 ◽  
Author(s):  
Valéria Forni Martins ◽  
Rafaela Letícia Brito Bispo ◽  
Priscilla de Paula Loiola
Keyword(s):  
Tropical Forest ◽  
Gender Equality ◽  
Tree Species ◽  
Forest Tree ◽  
Forest Tree Species

Effects of long-term nitrogen and phosphorus additions on soil acidification in an N-rich tropical forest

Geoderma ◽  
2017 ◽  
Vol 285 ◽  
pp. 57-63 ◽  
Author(s):  
Qinggong Mao ◽  
Xiankai Lu ◽  
Kaijun Zhou ◽  
Hao Chen ◽  
Xiaomin Zhu ◽  
...  
Keyword(s):  
Tropical Forest ◽  
Soil Acidification ◽  
Nitrogen And Phosphorus

scholarly journals Does Tropical Forest Fragmentation Increase Long-Term Variability of Butterfly Communities?

PLoS ONE ◽  
2010 ◽  
Vol 5 (3) ◽  
pp. e9534 ◽  
Author(s):  
Allison K. Leidner ◽  
Nick M. Haddad ◽  
Thomas E. Lovejoy
Keyword(s):  
Tropical Forest ◽  
Forest Fragmentation ◽  
Butterfly Communities

scholarly journals Long-term greenhouse gas emissions from hydroelectric reservoirs in tropical forest regions

1999 ◽  
Vol 13 (2) ◽  
pp. 503-517 ◽  
Author(s):  
Corinne Galy-Lacaux ◽  
Robert Delmas ◽  
Georges Kouadio ◽  
Sandrine Richard ◽  
Philippe Gosse
Keyword(s):  
Tropical Forest ◽  
Greenhouse Gas Emissions ◽  
Greenhouse Gas ◽  
Gas Emissions ◽  
Hydroelectric Reservoirs ◽  
Forest Regions
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