Long-term growth trends of massive Porites corals across a latitudinal gradient in the Indo-Pacific

2019 ◽  
Vol 626 ◽  
pp. 69-82 ◽  
Author(s):  
TB Razak ◽  
G Roff ◽  
JM Lough ◽  
D Prayudi ◽  
NE Cantin ◽  
...  
Keyword(s):  
Latitudinal Gradient ◽  
Growth Trends ◽  
Massive Porites

scholarly journals Distribution and ecological segregation on regional and microgeographic scales of the diploidCentaurea asperaL., the tetraploidC. seridisL., and their triploid hybrids (Compositae)

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5209 ◽  
Author(s):  
Alfonso Garmendia ◽  
Hugo Merle ◽  
Pablo Ruiz ◽  
Maria Ferriol
Keyword(s):  
Anthropogenic Disturbance ◽  
Large Scale ◽  
Latitudinal Gradient ◽  
Soil Parameters ◽  
Fine Scale ◽  
Contact Zones ◽  
Ecological Requirements ◽  
Adaptive Processes ◽  
Sympatric Cytotypes

Although polyploidy is considered a ubiquitous process in plants, the establishment of new polyploid species may be hindered by ecological competition with parental diploid taxa. In such cases, the adaptive processes that result in the ecological divergence of diploids and polyploids can lead to their co-existence. In contrast, non-adaptive processes can lead to the co-existence of diploids and polyploids or to differentiated distributions, particularly when the minority cytotype disadvantage effect comes into play. Although large-scale studies of cytotype distributions have been widely conducted, the segregation of sympatric cytotypes on fine scales has been poorly studied. We analysed the spatial distribution and ecological requirements of the tetraploidCentaurea seridisand the diploidCentaurea asperain east Spain on a large scale, and also microspatially in contact zones where both species hybridise and give rise to sterile triploid hybrids. On the fine scale, the position of eachCentaureaindividual was recorded along with soil parameters, accompanying species cover and plant richness. On the east Spanish coast, a slight latitudinal gradient was found. TetraploidC. seridisindividuals were located northerly and diploidC. asperaindividuals southerly. Tetraploids were found only in the habitats with strong anthropogenic disturbance. In disturbed locations with well-developed semi-fixed or fixed dunes, diploids and tetraploids could co-exist and hybridise. However, on a fine scale, although taxa were spatially segregated in contact zones, they were not ecologically differentiated. This finding suggests the existence of non-adaptive processes that have led to their co-existence. Triploid hybrids were closer to diploid allogamous mothers (C. aspera) than to tetraploid autogamous fathers (C. seridis). This may result in a better ability to compete for space in the tetraploid minor cytotype, which might facilitate its long-term persistence.

Long-term growth trends of Abies delavayi and its physiological responses to a warming climate in the Cangshan Mountains, southwestern China

2022 ◽  
Vol 505 ◽  
pp. 119943
Author(s):  
Rao-Qiong Yang ◽  
Fan Zhao ◽  
Ze-Xin Fan ◽  
Shankar Panthi ◽  
Pei-Li Fu ◽  
...  
Keyword(s):  
Physiological Responses ◽  
Southwestern China ◽  
Growth Trends ◽  
Warming Climate

Long-Term Growth Trends of Trees: Ten Years of Dendrochronological Studies in France

1996 ◽  
pp. 167-181 ◽  
Author(s):  
Vincent Badeau ◽  
Michel Becker ◽  
Didier Bert ◽  
Jean Luc Dupouey ◽  
François Lebourgeois ◽  
...  
Keyword(s):  
Growth Trends

Extracting environmentally driven growth trends from diameter increment series based on a multiplicative decomposition model

2011 ◽  
Vol 41 (8) ◽  
pp. 1577-1589 ◽  
Author(s):  
Chaofang Yue ◽  
Ulrich Kohnle ◽  
Marc Hanewinkel ◽  
Joachim Klädtke
Keyword(s):  
Conceptual Framework ◽  
Least Squares ◽  
Environmental Changes ◽  
Nonlinear Least Squares ◽  
Additive Models ◽  
Site Quality ◽  
Multiplicative Decomposition ◽  
Growth Trends ◽  
Diameter Increment

The study developed a conceptual framework for partitioning the components of diameter increment to potentially detect the influence of environmental changes. This process consisted of two steps. First, a multiplicative decomposition diameter increment model was introduced to evaluate the influence of ageing, site quality, competition status, and thinning effects on individual tree growth. Second, generalized additive models were applied to identify the nonlinear dynamic of growth trends caused by environmental changes. The conceptual framework was then applied to Norway spruce ( Picea abies (L.) Karst.) growing in southwest Germany. The database consisted primarily of tree ring series collected from trees cut from long-term experimental stands. Also, stand-level data were available from periodical remeasurements of these plots. The developed analytical technique effectively removed non-environment-related effects (ageing, site quality, and stand dynamic) from the growth signal provided in the diameter increment series. Growth trends deducted from estimates based on either nonlinear least squares, generalized nonlinear least squares, or nonlinear mixed-effects approaches displayed quite similar patterns. In general, the trend in diameter increment showed a long-term increase from the 1920s into the 1990s with a midterm depression in the 1940s that was followed by a significant decrease in the recent past.

Growth trends of blue oak (Quercusdouglasii) in California

1993 ◽  
Vol 23 (8) ◽  
pp. 1720-1724 ◽  
Author(s):  
Jane A. Kertis ◽  
Rob Gross ◽  
David L. Peterson ◽  
Michael J. Arbaugh ◽  
Richard B. Standiford ◽  
...  
Keyword(s):  
Mediterranean Climate ◽  
Basal Area ◽  
Limited Data ◽  
Deep Soil ◽  
Coniferous Species ◽  
Growth Trends ◽  
Blue Oak ◽  
Soil Moisture Availability ◽  
High Precipitation

Long-term growth trends of blue oak (Quercusdouglasii Hook. & Arn.) at five sites in California were quantified and interpreted with respect to annual precipitation. Mean annual basal area increment (BAI) at sites with deep soil profiles or high precipitation was twice as great as growth at other sites. In general, BAI increased sharply during approximately the first 40 years of tree growth, then increased gradually or leveled off for the next 100 years. Limited data from older trees suggest that BAI decreases gradually after this point. Growth trends are relatively homogeneous within each site, but vary among sites. Most sites have relatively high correlations with precipitation compared with coniferous species at higher elevations. Interannual variation in soil moisture availability is clearly an important factor affecting annual growth of blue oak in the Mediterranean climate of California. This is the first known dendroecological study of blue oak growth trends.

scholarly journals Tree demography dominates long-term growth trends inferred from tree rings

2016 ◽  
Vol 23 (2) ◽  
pp. 474-484 ◽  
Author(s):  
Roel J. W. Brienen ◽  
Manuel Gloor ◽  
Guy Ziv
Keyword(s):  
Tree Rings ◽  
Growth Trends ◽  
Tree Demography

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 Changes of Tree and Stand Growth: Review and Implications

2021 ◽  
pp. 189-222
Author(s):  
H. Pretzsch ◽  
M. del Río ◽  
F. Giammarchi ◽  
E. Uhl ◽  
R. Tognetti
Keyword(s):  
Climate Change ◽  
Forest Growth ◽  
Biotic And Abiotic Stress ◽  
Mixed Stands ◽  
Growth Trend ◽  
Growth Trends ◽  
Stand Growth ◽  
Human Footprint ◽  
Growth Reaction

AbstractIn this chapter, we review the current long-term growth trends and short-term growth reaction to single or repeated stress events on tree and stand level in Europe. Based on growth trend analyses, the chapter reveals the strong human footprint on forest ecosystems.First, we use long-term experiments and increment cores to show change in growth trends within the last centuries. Growth reactions are caused by deposition and climate change rather than by silvicultural measures. Second, we look closer on regional-specific deviations from the general trend. Climate change, drought events, acid rain and O3 are causing regional-specific growth reaction patterns. Third, we assess stress events and the resilience and resistance of monospecific and mixed stands against biotic and abiotic stress in view of the ongoing growth trends.The revealed tree and stand growth behaviours are highly relevant, as any changes of forest growth and structure have strong impacts on the provision of goods and ecosystem services. The results underline the importance of biomonitoring and suggest counteracting measures by forest planning, adaptation of silvicultural guidelines for existing forest and innovative design of future forests stands.

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