Abstract:
:Controls of fine dynamics were investigated in a Pinus palustris Mill. (longleaf pine) woodland subjected to two understory vegetation treatments (control versus removed) and four overstory treatments (no gap control, and canopy gaps of three sizes with constant total gap area per stand). Fine root (<2 mm diameter) dynamics were measured over 11 months using ingrowth cores (all treatments) and minirhizotrons (understory removed in no gap control and large gap treatments only). At the fine (microsite) spatial scale, pine and non-pine root mass production responded negatively to each other (P=0.033). Each life form was significantly (P< or =0.028) related to nearby overstory density, and pine root production compensated for reductions in non-pine roots if understory vegetation was removed. Soil moisture and NO(3) mineralization rate were negatively related to pine root mass production (ingrowth cores; P<0.001 and P=0.052) and positively related to pine root length production, mortality and turnover (minirhizotrons; P from <0.001 to 0.078). Temperature variance was negatively related to pine root lifespan P<0.001) and positively related to pine root turnover (P=0.003). At the ecosystem scale, pattern of overstory disturbance (gap size and number) had no significant effect on non-pine, pine, or total root production. However, the presence of gaps (versus the no-gap control) increased non-pine root mass production (ANOVA, P=0.055) in natural understory conditions, and reduced pine root mass production (P=0.035) where the understory was removed. Ecosystem-wide pine root length production, mortality and turnover were positively related to weekly soil temperature (P< or =0.02). In natural systems, fine root dynamics are highly variable and strongly affected by biotic factors. Roots quickly close belowground gaps because one life form (pine or non-pine) compensates for the absence of the other. When understory vegetation is removed, however, pine roots respond to the local abiotic environment, particularly moisture and NO(3).
journal_name
Oecologiajournal_title
Oecologiaauthors
Jones RH,Mitchell RJ,Stevens G,Pecot Sdoi
10.1007/s00442-002-1098-ysubject
Has Abstractpub_date
2003-01-01 00:00:00pages
132-43issue
1eissn
0029-8549issn
1432-1939journal_volume
134pub_type
杂志文章相关文献
OECOLOGIA文献大全abstract::In fasting Pisidium amnicum and Sphaerium corneum, regular periods of behavioural and metabolic quiescence were shown to occur in the normoxic, constant environment of the flow-through chamber of a heat-flow microcalorimeter. The metabolic rate was suppressed to 7.5% of normal at 10° C and to 8.5-9.7% at 20° C for per...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00317674
更新日期:1993-03-01 00:00:00
abstract::Rodents of the family Heteromyidae are proficient gatherers and hoarders of seeds. A major component of their adaptive specialization for harvesting and transporting seeds is their spacious, fur-lined cheek pouches. Precise measurements of cheek pouch capacities are essential if ecologists are to understand the foragi...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050349
更新日期:1997-12-01 00:00:00
abstract::We used a complete block design to experimentally study direct and indirect interactions in a three trophic-level freshwater system consisting of a top predator, the green sunfish, Lepomis cyanellus, an intermediate predator, small-mouthed salamander larvae, Ambystoma barbouri, and prey, hatchling isopods, Lirceus fon...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00323765
更新日期:1991-02-01 00:00:00
abstract::Plant physiological strategies of carbon (C) and nitrogen (N) uptake and metabolism are often regarded as outcomes of environmental selection. This is likely true, but the role of evolutionary history may also be important in shaping patterns of functional diversity. Here, we used leaf C and N stable isotope ratios (δ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-018-4186-3
更新日期:2018-08-01 00:00:00
abstract::The presence of spines on woody plants has been shown to limit the loss of foliage to large mammalian browsers by restricting both bite size and biting rate. We tested the hypothesis that plant spines are also an effective defense against browsing by small mammals, such as rodents, that climb within the canopy of shru...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050371
更新日期:1998-01-01 00:00:00
abstract::Natural history collections are now being championed as key to broad ecological studies, especially those involving human impacts in the Anthropocene. However, collections are going through a crisis that threatens their present and future value, going beyond underfunding/understaffing to a more damaging practice: curr...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-020-04620-0
更新日期:2020-03-01 00:00:00
abstract::In an environment fluctuating in a predicatable manner with wide among-year variation in offspring mortality, fitness is largely influenced by the timing of reproductive investment. In vole-eating nocturnal Tengmalm's owls (Aegolius funereus), within-cycle variation in 1st-year survival of owlets is 3-fold as estimate...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00323151
更新日期:1994-03-01 00:00:00
abstract::Plant stigmas and bee pollinators are competitors for pollen. Pollen placed on a pollinator's body can be picked up by conspecific stigmas or it can be collected by the pollinator as food. Hypothetically, one solution is for pollen to be placed on 'safe sites' on the pollinator's body, sites where the pollinator canno...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-017-3999-9
更新日期:2018-01-01 00:00:00
abstract::The tenets of optimal foraging theory are used to contrast the behavior of the predatory snail Acantina spirata when feeding on the barnacles Balanus glandula and Chthamalus fissus under conditions of satiation and starvation. As predicted in optimal diet models, A. spirata is less selective (ratio of attack frequency...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00377564
更新日期:1987-06-01 00:00:00
abstract::Increased biological diversity due to invasion by non-indigenous species (NIS) is a global phenomenon with potential effects on trophic interactions and ecosystem processes in the invaded habitat. We assessed the effects of resource availability and invasion of three non-indigenous invertebrate grazers (two crustacean...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-011-2061-6
更新日期:2012-01-01 00:00:00
abstract::Effects of herbicides (Garlone 3A, MCPA, 2,4-D and Krenite) and nitrogen fertilizer (NH4NO3), commonly used in Swedish forestry, on nitrogen fixation (C2H2-reduction) by Peltigera praetextata (Sommerf.) Zopf. (field and laboratory) and its phycobiont Nostoc sp. (laboratory) were studied. The alga was affected by the h...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00388807
更新日期:1979-01-01 00:00:00
abstract::Activity of soil decomposer microorganisms is generally limited by carbon availability, but factors controlling saprophagous soil animals remain largely unknown. In contrast to microorganisms, animals are unable to exploit mineral nutrient pools. Therefore, it has been suggested that soil animals, and earthworms in pa...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-003-1391-4
更新日期:2004-01-01 00:00:00
abstract::Birds searching for insects in the canopy of a northern hardwoods forest depart significantly from random in their use of tree species, even when these trees are generally similar in life form. All 10 foliage-dwelling bird species in the Hubbard Brook forest showed preferences for Yellow Birch, most had an aversion to...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00346985
更新日期:1981-02-01 00:00:00
abstract::A 9-year study of the structure of assemblages of fish on 20 coral patch reefs, based on 20 non-manipulative censuses, revealed a total of 141 species from 34 families, although 40 species accounted for over 95% of sightings of fish. The average patch reef was 8.5 m2 in surface area, and supported 125 fish of 20 speci...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00326094
更新日期:1994-06-01 00:00:00
abstract::Climate plays a fundamental role in limiting the range of a species, is a key factor in the dynamics of large herbivores, and is thought to be involved in declines of moose populations in recent decades. We examined effects of climate and growing-season phenology on recruitment (8-9 months old) of young Shiras moose (...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-015-3296-4
更新日期:2015-08-01 00:00:00
abstract::With multiple species introductions and rapid global changes, there is a need for comprehensive invasion models that can predict community responses. Evidence suggests that abiotic constraint, propagule pressure, and biotic resistance of resident species each determine plant invasion success, yet their interactions ar...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-014-3188-z
更新日期:2015-05-01 00:00:00
abstract::Nitrogen deposition in the northeastern US changed N availability in the latter part of the twentieth century, with potential legacy effects. However, long-term N cycle measurements are scarce. N isotopes in tree rings have been used as an indicator of N availability through time, but there is little verification of w...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-019-04528-4
更新日期:2019-12-01 00:00:00
abstract::Functional diversity has been identified as a key to understanding ecosystem and community functioning. However, due to the lack of a sound definition its nature and measurement are still poorly understood. In the same way that species diversity can be split into species richness and species evenness, so functional di...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-004-1744-7
更新日期:2005-01-01 00:00:00
abstract::In East African savanna we found that leaves of mature tree species with symbiotic N2 fixation contained lower concentrations of polyphenols than leaves of species without this symbiosis. We suggest that the root symbiosis is costly to the plant in terms of photosynthate that otherwise could be used in chemical defens...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00317873
更新日期:1993-03-01 00:00:00
abstract::We assessed the ecomorphological structure of a guild of rhinolophoid bats in a Malaysian rainforest first described by Heller and von Helversen (1989). These authors found that the distribution of echolocation call frequencies used by 12 syntopic species was more even than expected from allometric relationships or in...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/PL00008866
更新日期:2000-08-01 00:00:00
abstract::An empirical model for predicting net photosynthesis (P N ) and dark respiration (R D ) in the field was developed and tested for Bouteloua gracilis (H.B.K.) Lag., the dominant C4 grass of the North American shortgrass prairie. P N is predicted as a function of soil water potential, canopy air temperature, irradiance,...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00344844
更新日期:1978-01-01 00:00:00
abstract::Seedlings of six subtropical rainforest tree species representing early (Omalanthus populifolius, Solanum aviculare), middle (Duboisia myoporoides, Euodia micrococca) and late (Acmena ingens, Argyrodendron actinophyllum) successional stages in forest development were grown in a glasshouse, under four levels of neutral...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00323788
更新日期:1991-06-01 00:00:00
abstract::C(4) plants are rare in cool climates, an ecological pattern attributable to their poor photosynthetic performance at low temperatures relative to C(3) species. However, some C(4) species are able to persist at high latitudes and high elevations, possibly due to the characteristics of the particular microsites they in...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-003-1369-2
更新日期:2003-11-01 00:00:00
abstract::Computer simulations of a pollinator foraging in a mixture of two species were used to explore how plant reproduction can be influenced by interspecific pollination movements. Interspecific pollen transfer led to strong competitive effects when availabilities of pollen, receptive stigma surfaces, or pollinator movemen...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00349811
更新日期:1978-01-01 00:00:00
abstract::We examined the relative ability of multiple factors to explain variation in two interrelated life-history traits, interclutch interval and annual reproductive success, in feral pigeons. Seasonal influences, brood size, and female body mass and tarsus length explained significant amounts of variation in interclutch in...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00789936
更新日期:1989-03-01 00:00:00
abstract::We report evidence from controlled experiments that long straight thorns deter herbivory by browsers. Cut branches of three woody species that had their thorns removed suffered significantly greater herbivory by a tethered goat than did paired intact branches. Branches on living Acacia seyal plants that had their thor...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00317391
更新日期:1991-03-01 00:00:00
abstract::Much of the research into herbivore ecology and evolution has focused on patterns and mechanisms of niche partitioning in the diets of specialized grazers and browsers, but the significance of the balance of grazing and browsing within intermediate feeders present unique questions that have received less attention. We...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-008-1200-1
更新日期:2009-01-01 00:00:00
abstract::In previous papers we have described and verified a primary production model of the desert shrub Larrea tridentata. Here we address the validation phase of the evaluation of this model. Two versions of the model which differ in the priority scheme used for allocating carbon to reproductive or vegetative organs were co...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00540906
更新日期:1981-01-01 00:00:00
abstract:: In spite of recent theoretical interest, few field studies have addressed the links between individual behavioral decisions and population distribution. This work analyzes the foraging behavior of individuals and the spatial distribution of a population of blue tits (Parus caeruleus) just before the main breeding sea...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050256
更新日期:1997-07-01 00:00:00
abstract::Animals in fragmented landscapes have a major challenge to move between high-quality habitat patches through lower-quality matrix. Two current mechanistic hypotheses that describe the movement used by animals outside of their preferred patches (e.g., high-quality habitat or home range) are the biased, correlated rando...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-012-2475-9
更新日期:2013-05-01 00:00:00