Geographic variation in growth response of Douglas-fir to interannual climate variability and projected climate change

2010 ◽  
Vol 16 (12) ◽  
pp. 3374-3385 ◽  
Author(s):  
PEI-YU CHEN ◽  
CEDAR WELSH ◽  
ANDREAS HAMANN
Keyword(s):  
Climate Change ◽  
Climate Variability ◽  
Geographic Variation ◽  
Growth Response ◽  
Douglas Fir ◽  
Interannual Climate Variability

scholarly journals Simulated rice yields as affected by interannual climate variability and possible climate change in Java

1999 ◽  
Vol 12 ◽  
pp. 145-152 ◽  
Author(s):  
I Amien ◽  
P Redjekiningrum ◽  
B Kartiwa ◽  
W Estiningtyas
Keyword(s):  
Climate Change ◽  
Climate Variability ◽  
Rice Yields ◽  
Interannual Climate Variability

Effects of interannual climate variability and climate change on rice yield in Java, Indonesia

1996 ◽  
Vol 92 (1-2) ◽  
pp. 29-39
Author(s):  
I. Amien ◽  
P. Rejekiningrum ◽  
A. Pramudia ◽  
E. Susanti
Keyword(s):  
Climate Change ◽  
Climate Variability ◽  
Rice Yield ◽  
Interannual Climate Variability

scholarly journals Household Vulnerability and Transformability in Limpopo National Park

2021 ◽  
Vol 13 (5) ◽  
pp. 2597
Author(s):  
Michel Notelid ◽  
Anneli Ekblom
Keyword(s):  
Climate Change ◽  
Climate Variability ◽  
National Park ◽  
Wildlife Trade ◽  
Household Economy ◽  
Cattle Production ◽  
Social Fabric ◽  
The Social ◽  
Household Vulnerability ◽  
Interannual Climate Variability

In this paper, household vulnerability in Limpopo National Park (LNP) is discussed in relation to interannual climate variability and the effects of the park itself. Climate variability is high and projected to increase with climate change. Meanwhile, the establishment of the national park in 2002 has added both challenges and possibilities. We present the results of livelihood surveys carried out 2013 and discuss changes taking place in and around the park until present day. Constraints and possibilities for endurability of households are discussed. In conclusion, the vulnerability of the LNP households to climate change is high, but there are a number of strategies in place to ensure endurability. Migrant labour is vital for household economy, and cattle production is important for endurability. The hunting ban in the park and losses of crops and livestock due to wildlife present serious challenges. Income from the illegal wildlife trade, which exploded from 2011, has had little impact on household economy or in mitigating household vulnerability but has had devastating effects on the social fabric of households. We discuss possible avenues for transformability, where access to markets and transport remain a challenge for farmers. Individual cattle owners’ view of constraints and possibilities for expanding cattle herding are discussed and assessed in terms of transformability.

A method for estimating vulnerability of Douglas-fir growth to climate change in the northwestern U.S.

2005 ◽  
Vol 81 (3) ◽  
pp. 369-374 ◽  
Author(s):  
Jeremy S Littell ◽  
David L Peterson
Keyword(s):  
Climate Change ◽  
Climate Variability ◽  
Pseudotsuga Menziesii ◽  
Douglas Fir ◽  
Climate Impacts ◽  
Spatiotemporal Variability ◽  
Limiting Factors ◽  
Montane Forests ◽  
Growth Variability ◽  
Wide Range

Borrowing from landscape ecology, atmospheric science, and integrated assessment, we aim to understand the complex interactions that determine productivity in montane forests and utilize such relationships to forecast montane forest vulnerability under global climate change. Specifically, we identify relationships for precipitation and temperature that govern the spatiotemporal variability in Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) growth by seeking similarities in patterns of growth/climate models across a significant portion of the climatological range of the species. In the 21st century and beyond, sustainable forestry will depend on successful adaptation to the impacts of climate change and climate variability on forest structure and function. The combination of these foci will allow improved prediction of the fate of montane forests over a wide range of biogeoclimatic conditions in western North America and thus allow improved management strategies for adapting to climate change. We describe a multi-disciplinary strategy for analyzing growth variability as a function of climate over a broad range of local-to-regional influences and demonstrate the efficacy of this sampling method in defining regional gradients of growth-limiting factors. Key words: Douglas-fir, Pseudotsuga menziesii, climate variability, climate impacts, mechanism-response, tree rings, growth-climate relationships

Tree rings and genetic control of drought resilience

2021 ◽  
Author(s):  
Miriam Isaac-Renton ◽  
David Montwé ◽  
Michael Stoehr ◽  
Jonathan Degner ◽  
Trisha Hook ◽  
...  
Keyword(s):  
Climate Change ◽  
Genetic Control ◽  
Tree Rings ◽  
Growth Response ◽  
Genetic Correlations ◽  
Tree Height ◽  
Tree Breeding ◽  
Douglas Fir ◽  
Western Redcedar ◽  
Drought Resilience

<p>Severe drought events are affecting forests around the world, even in temperate climates. A viable climate change adaptation strategy may involve planting forests with trees more resilient to drought. The majority of the 300 million seedlings planted annually in western Canada are genetically-selected trees derived from tree breeding programs. Since tree breeding populations supply the seed that is deployed on the landscape, it is important to closely examine the degree of genetic control of drought resilience in these populations – yet methods for evaluating drought responses in mature experimental trials are limited. We evaluated the potential to use tree rings to infer genetic adaptation to drought. Specifically, we used annual growth increments to evaluate the genetic component behind variation in drought resilience. We also quantified potential genetic trade-offs between drought resilience and growth in long-term progeny trials. We worked with two economically and ecologically valuable sympatric conifers, coastal Douglas-fir (<em>Pseudotsuga menziesii </em>var. <em>menziesii</em>) and western redcedar (<em>Thuja plicata</em>). Annual growth increment and tree height data were obtained from 1980 coastal Douglas-fir trees (93 polycross families on two well-replicated sites at age 19) and 1520 western redcedar trees (26 polycross families on three well-replicated sites at age 18). All trees showed substantial reduction in growth under drought, but there was clear variability in the longer-term response of families within each breeding population. The heritability (h<sup>2</sup>) of such drought resilience, or proportion of this variation explained by genetics, was high for Douglas-fir (h<sup>2</sup> = 0.26, SE = 0.07) and moderate for redcedar (h<sup>2</sup> = 0.13, SE = 0.04). Preliminary genetic correlations between tree height and drought resilience were also positive for both species (Douglas-fir: r<sub>g</sub> = 0.77, SE = 0.18; redcedar: r<sub>g</sub> = 0.62, SE = 0.17). Families that were both high-yielding and drought resilient could also be identified. Since growth response to drought is a variable and heritable trait, these traits are therefore under the control of the tree breeder. Moreover, the positive genetic correlations between tree height and an adaptive growth response to drought suggest that historic selection for tree height did not compromise drought resilience of planted seedlings. Tree rings appear to be an effective tool to screen these populations for drought resilience, which will help ensure that planted trees will remain healthy and productive under climate change.</p>

VARIABILIDAD CLIMÁTICA, CAMBIO CLIMÁTICO Y PESQUERÍAS EN EL ECUADOR.

2012 ◽  
Vol 1 (1) ◽  
Author(s):  
Johnny Chavarría Viteri ◽  
Dennis Tomalá Solano
Keyword(s):  
Climate Change ◽  
Climate Variability ◽  
Pacific Decadal Oscillation ◽  
El Niño ◽  
El Nino ◽  
Southern Oscillation ◽  
El Niño Southern Oscillation ◽  
El Nino Southern Oscillation ◽  
Current Action ◽  
Palabras Clave

La variabilidad climática es la norma que ha modulado la vida en el planeta. Este trabajo demuestra que las pesquerías y acuicultura costera ecuatorianas no son la excepción, puesto que tales actividades están fuertemente influenciadas por la variabilidad ENSO (El Niño-Oscilación del Sur) y PDO (Oscilación Decadal del Pacífico), planteándose que la señal del cambio climático debe contribuir a esta influencia. Se destaca también que, en el análisis de los efectos de la variabilidad climática sobre los recursos pesqueros, el esfuerzo extractivo también debe ser considerado. Por su parte, la acción actual de la PDO está afectando la señal del cambio climático, encontrándose actualmente en fases opuestas. Se espera que estas señales entren en fase a finales de esta década, y principalmente durante la década de los 20 y consecuentemente se evidencien con mayor fuerza los efectos del Cambio Climático. Palabras Clave: Variabilidad Climática, Cambio Climático, ENSO, PDO, Pesquerías, Ecuador. ABSTRACT Climate variability is the standard that has modulated life in the planet. This work shows that the Ecuadorian  fisheries and aquaculture are not the exception, since such activities are strongly influenced by ENSO variability (El Niño - Southern Oscillation) and PDO (Pacific Decadal Oscillation), considering that the signal of climate change should contribute to this influence. It also emphasizes that in the analysis of the effects of climate variability on the fishing resources, the extractive effort must also be considered. For its part, the current action of the PDO is affecting the signal of climate change, now found on opposite phases. It is hoped that these signals come into phase at the end of this decade, and especially during the decade of the 20’s and more strongly evidencing the effects of climate change. Keywords: Climate variability, climate change, ENSO (El Niño - Southern Oscillation) and PDO  (Pacific Decadal Oscillation); fisheries, Ecuador. Recibido: mayo, 2012Aprobado: agosto, 2012

Sign in / Sign up

Export Citation Format

Share Document