Physiology and genetics of tree growth response to moisture and temperature stress: an examination of the characteristics of loblolly pine (Pinus taeda L.)

Abstract

Water stress and temperature impose fundamental limits to forest productivity. Stresses caused by fluctuating or extreme temperatures or limited water availability vary both seasonally and from year to year. The role of these stresses should be considered when investigating the causes of declines in forest productivity. Forest growth, or carbon gain, can be related quantitatively to three components: leaf area, rate of net photosynthesis and rate of respiration. This paper examines effects of temperature and water supply on these components with particular reference to loblolly pine (Pinus taeda L.), a species of economic importance in the southeastern United States where declines, of unknown cause, in forest productivity have been reported.

Sensibilité à la sécheresse et reprise des semis transplantés de Quercus rubra en relation avec la morphologie racinaire

“…Transplant shock was also indicated by reduced leaf area (Fig. 4B) consistent with results for loblolly pine (Pinus taeda L.) (Teskey et al, 1987), Douglas-fir (Haase and Rose, 1993), and northern red oak (Struve and Joly, 1992) seedlings. The mild water stress in WW plants following transplant indicates that there is a time lag during which transplanted seedlings must re-establish rootsoil contact for resource exploitation, and may also infer temporary impairment of root function (Burdett, 1990;Sands, 1984).…”

“…Such a growth allocation strategy is a wellknown adaptive mechanism by which plants respond to limitations of belowground resources (Teskey et al, 1987). In addition, reduced leaf area as observed in smaller RvC seedlings (Fig.…”

Changes in Climate, Forest Phenology, and Forest Disturbances Around Western Lake Superior

“…Vegetation stress can occur when soil moisture availability is insuffi cient to meet transpiration demand. Conditions promoting moisture stress can inhibit transpiration and reduce growth [Teskey et al, 1987], promote leaf wilt and early senescence [ Munné-Bosch and Alegre, 2004;Marchin et al, 2010], enhance tree mortality [Anderegg et al, 2012[Anderegg et al, , 2013, and reduce carbon uptake over long times [Brzostek et al, 2014;Koster et al, 2014].…”

Predictions and Projections of Pine Productivity and Hydrology in Response to Climate Change Across the Southern United States

“…Predicted growth rates were within the general range of forest growth measured by others. Teskey et al, (1987) measured a range of aboveground NPP between 2 and 101 dry matter ha~' year"' on loblolly pine sites. Other studies have estimated that belowground production equals approximately 40% of aboveground NPP (Nadelhoffer et al, 1985;Whittaker and Marks, 1975).…”

“…Other studies have estimated that belowground production equals approximately 40% of aboveground NPP (Nadelhoffer et al, 1985;Whittaker and Marks, 1975). Multiplying Teskey et al, (1987) measurements of aboveground NPP by 1.4, which represents the approximate 30% additional NPP that occurs belowground, yielded a measured range of total (aboveground and belowground) NPP between 2.8 and 14.0 t biomass ha~' yr -1 , with most site NPP (aboveground only) > 8.5 t biomass ha-1 yi-1 (Teskey et al, 1987). The NPP predicted by PnET-HS fell within this measured range of NPP.…”