<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Reich, P. B.</style></author><author><style face="normal" font="default" size="100%">Ellsworth, D.S.</style></author><author><style face="normal" font="default" size="100%">Walters, M</style></author><author><style face="normal" font="default" size="100%">Vose, J.</style></author><author><style face="normal" font="default" size="100%">Gresham, C.</style></author><author><style face="normal" font="default" size="100%">Volin, J.</style></author><author><style face="normal" font="default" size="100%">Bowman, W.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">How general are relationships between photosynthetic capacity, leaf life- span and other leaf traits? A test from six diverse ecosystems. Ecol. Soc. Amer. Bulletin, in press.</style></title></titles><keywords><keyword><style  face="normal" font="default" size="100%">CDR</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1996</style></year></dates><language><style face="normal" font="default" size="100%">eng</style></language><accession-num><style face="normal" font="default" size="100%">LTER.1996-6961</style></accession-num></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Vose, J.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Factors influencing the amount and distribution of leaf area of pine stands.</style></title><secondary-title><style face="normal" font="default" size="100%">Ecol</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">CWT</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1994</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://cwt33.ecology.uga.edu/publications/328.pdf</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">43</style></volume><pages><style face="normal" font="default" size="100%">102-114</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Leaf area index (LAI) of forest ecosystems determines rates of energy and material exchange between plant canopies and the atmosphere. Considerable variation exists in the value and timing of maximum LAI in pine stands. Maximum LAI (total) varied from 5 to 30 across a rang of species and environments and this was reached 8 to 50 yrs after stand establishment.  The variation in maximum LAI was related to multiple factors including site quality (climate and soils) and shade tolerance. Timing differences appear to be related to growth rates and stocking/stand density relationships. Rapid growth rates, well stocked stands, and warm climates result in the earliest canopy closure. Nitrogen most commonly limits LAI, although water can limit LAI in arid environments. Other nutrients may also limit LAI but have been less extensively studied. Seasonal dynamics vary considerably among pines and this is due to species dependent differences in foliar longevity. species with relatively few foliage age classes are the most dynamic seasonally and are most responsive to environmental fluctuations. Among several pine species, vertical LAI distribution in closed canopies follows a normal distribution.</style></abstract><accession-num><style face="normal" font="default" size="100%">LTER.1994-80734</style></accession-num></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Vose, J.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Fire, drought, and forest management influences on pine/hardwood ecosystems in the Southern  Appalachians.</style></title><secondary-title><style face="normal" font="default" size="100%">Fire and forest meteorology: proceedings of the 12th  international conference on fire and forest meteorology; 1993 October  26-28; Jekyll Island, Georgia</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">CWT</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">1994</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://cwt33.ecology.uga.edu/publications/330.pdf</style></url></web-urls></urls><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Establishment and maintenance of pitch pine/hardwood ecosystems in the southern Appalachians depends on intense wildfire. These ecosystems typically have a substantial evergreen shrub component (Kalmia latifolia) which limits regeneration of future overstory species. Wildfires provide microsite conditions conducive to pine regeneration and reduce Kalmia competition. Recent droughts in the region have resulted in significant acreages of southern pine beetle killed pine/hardwood stands. Site conditions are amenable to the high intensity fires needed to regenerate pine; however, fire suppression limits the role of wildfire in these ecosystems. Research shows that pines will not regenerate in the absence of severe disturbance, such as a high intensity fire, and mixed pine/hardwood ecosystem will not be maintained. Currently, some of these ecosystems are being slashed, burned, and planted with white pine (Pinus strobus) in an effort to restore site productivity. Our findings show that high intensity prescribed burning results in substantial pine regeneration and re-creation of mixed pine/hardwood ecosystems.</style></abstract><accession-num><style face="normal" font="default" size="100%">LTER.1994-80732</style></accession-num></record></records></xml>