Abstract:
:The transition between wintertime net carbon loss and springtime net carbon assimilation has an important role in controlling the annual rate of carbon uptake in coniferous forest ecosystems. We studied the contributions of springtime carbon assimilation to the total annual rate of carbon uptake and the processes involved in the winter-to-spring transition across a range of scales from ecosystem CO2 fluxes to chloroplast photochemistry in a coniferous, subalpine forest. We observed numerous initiations and reversals in the recovery of photosynthetic CO2 uptake during the initial phase of springtime recovery in response to the passage of alternating warm- and cold-weather systems. Full recovery of ecosystem carbon uptake, whereby the 24-h cumulative sum of NEE (NEEdaily) was consistently negative, did not occur until 3-4 weeks after the first signs of photosynthetic recovery. A key event that preceded full recovery was the occurrence of isothermality in the vertical profile of snow temperature across the snow pack; thus, providing consistent daytime percolation of melted snow water through the snow pack. Interannual variation in the cumulative annual NEE (NEEannual) was mostly explained by variation in NEE during the snow-melt period (NEEsnow-melt), not variation in NEE during the snow-free part of the growing season (NEEsnow-free). NEEsnow-melt was highest in those years when the snow melt occurred later in the spring, leading us to conclude that in this ecosystem, years with earlier springs are characterized by lower rates of NEEannual, a conclusion that contrasts with those from past studies in deciduous forest ecosystems. Using studies on isolated branches we showed that the recovery of photosynthesis occurred through a series of coordinated physiological and biochemical events. Increasing air temperatures initiated recovery through the upregulation of PSII electron transport caused in part by disengagement of thermal energy dissipation by the carotenoid, zeaxanthin. The availability of liquid water permitted a slightly slower recovery phase involving increased stomatal conductance. The most rate-limiting step in the recovery process was an increase in the capacity for the needles to use intercellular CO2, presumably due to slow recovery of Rubisco activity. Interspecific differences were observed in the timing of photosynthetic recovery for the dominant tree species. The results of our study provide (1) a context for springtime CO2 uptake within the broader perspective of the annual carbon budget in this subalpine forest, and (2) a mechanistic explanation across a range of scales for the coupling between springtime climate and the carbon cycle of high-elevation coniferous forest ecosystems.
journal_name
Oecologiajournal_title
Oecologiaauthors
Monson RK,Sparks JP,Rosenstiel TN,Scott-Denton LE,Huxman TE,Harley PC,Turnipseed AA,Burns SP,Backlund B,Hu Jdoi
10.1007/s00442-005-0169-2subject
Has Abstractpub_date
2005-11-01 00:00:00pages
130-47issue
1eissn
0029-8549issn
1432-1939journal_volume
146pub_type
杂志文章相关文献
OECOLOGIA文献大全abstract::In order to monitor the nitrate assimilation capability of mire plants, in vivo current and maximally induced nitrate reductase activity (NRA) were investigated in 14 species of vascular plants from four different sites in a central Swedish mire. One of the sites was a swamp forest. The plants studied included species...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00320411
更新日期:1991-09-01 00:00:00
abstract::We tested the existence of general patterns in the photosynthetic metabolism of oxygen-evolving organisms, based on a compilation of data for 315 species ranging from cyanobacteria to tree leaves. We used thickness and chlorophyll a concentration of the photosynthetic structure (cell, thallus, leaf) to scale differenc...
journal_title:Oecologia
pub_type: 杂志文章,评审
doi:10.1007/BF00334642
更新日期:1996-10-01 00:00:00
abstract::Several studies published over the last years suggest that the ability of many species to cope with global change will be closely related to the current amount of plasticity for fitness-related traits. Thus, disentangling general patterns in phenotypic flexibility, which could be then included in models aimed to predi...
journal_title:Oecologia
pub_type: 杂志文章,meta分析
doi:10.1007/s00442-013-2682-z
更新日期:2013-11-01 00:00:00
abstract::A new technique based upon the dilution of C 14 /C 12 ratios in structural carbon of root systems during the course of the growing season was used to evaluate belowground turnover or productivity of two cool desert communities in northern Utah, USA. This technique provides a measure of turnover of the root system of e...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00346275
更新日期:1974-06-01 00:00:00
abstract::The demographic and ecological characteristics of island populations of small mammals have received increasing attention in recent years, but few studies have compared the behavioral characteristics of island populations with those of mainland populations. Behavior is considered an important variable because it is bel...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00540916
更新日期:1981-01-01 00:00:00
abstract::Life history theory and empirical studies suggest that large size or earlier metamorphosis are suitable proxies for increased lifetime fitness. Thus, across a gradient of larval habitat quality, individuals with similar phenotypes for these traits should exhibit similar post-metamorphic performance. Here we examine th...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-010-1728-8
更新日期:2010-12-01 00:00:00
abstract::The amount of calcium in Eucalyptus diversicolor (karri) ecosystems is high in comparison with other eucalypt forest ecosystems in Australia. A large proportion of this calcium is present as crystalline Ca oxalate. Whewellite (CaC2O4·H2O) accumulates in leaf tissue of the over- and understorey species. Up to 70% of th...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00379696
更新日期:1983-02-01 00:00:00
abstract::Occurrence and diet of ten carnivorous predators (four falconiforms, four owls, and two foxes), and population levels of their mammalian prey, were monitored over 45 months at a semi-arid site in north-central Chile. Early in this period, small mammals irrupted and then declined markedly to a density 7% of that at pea...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00319020
更新日期:1992-01-01 00:00:00
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::Global changes interact with plant invasions by differentially impacting native and invasive species. For example, invasive plants often benefit from eutrophication to a greater degree than native plants. While this is well-documented, a broad, trait-based explanation for this phenomenon is lacking. Recent research sh...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-020-04734-5
更新日期:2020-08-01 00:00:00
abstract::While foliar photosynthetic relationships with light, nitrogen, and water availability have been well described, environmental factors driving vertical gradients of foliar traits within forest canopies are still not well understood. We, therefore, examined how light availability and vapour pressure deficit (VPD) co-de...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-019-04583-x
更新日期:2020-02-01 00:00:00
abstract::We tested the hypothesis that leaves of broad-leaved tree species are more highly defended at low latitudes than at high latitudes. We used canonical discriminant analysis to compare tree species from Panama (9°N, 39 species), Missouri, USA (38°N, 37 species), and southern Ontario, Canada (44°N, 34 species) with respe...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-012-2249-4
更新日期:2012-07-01 00:00:00
abstract::Both spatial processes and environmental control may structure metacommunities, but their relative importance may be contingent on the dispersal ability of organisms. I examined the roles of spatial and environmental factors for the structuring of littoral macroinvertebrate communities across a set of lakes in a borea...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-012-2451-4
更新日期:2013-04-01 00:00:00
abstract::We studied the role of nematode predation in the functioning of detrital food webs assembled in microcosms. The microcosms contained defaunated humus and litter materials, a diverse microbial community with bacteria, fungi and protozoa, and a birch (Betula pendula) seedling infected with mycorrhizal fungi. Different l...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050859
更新日期:1999-08-01 00:00:00
abstract::The effect of water immersion on the non-parasitic stages of Boophilus microplus were investigated both under laboratory and field conditions. Survival of engorged female ticks was influenced by their age and the temperature of the water. Eggs and larvae were more resistant to submerison than were engorged females and...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00344915
更新日期:1971-09-01 00:00:00
abstract::Dreissenid mussels (Dreissena polymorpha and D. bugensis) have re-engineered Great Lakes ecosystems since their introduction in the late 1980s. Dreissenids can have major indirect impacts on profundal habitats by redirecting nutrients and energy away from pelagic production (which supplies profundal production) and de...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-008-1271-z
更新日期:2009-04-01 00:00:00
abstract::Most models of parental investment in offspring assume a trade-off between propagule size and number, and an increasing "concave down" function relating offspring fitness to propagule size. In this study, we test these two fundamental assumptions, using three closely related species of crickets, Gryllus firmus, G. vel...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00329806
更新日期:1995-06-01 00:00:00
abstract::There is an increasing ecological interest in understanding the gradients in H(2)(18)O enrichment in leaf water (i.e. a Péclet effect), because an appreciation of the significance of the Péclet effect is important for improving our understanding of the mechanistic processes affecting the (18)O composition of leaf wate...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-003-1449-3
更新日期:2004-02-01 00:00:00
abstract::Climate change is expected to reduce annual precipitation by 20% and increase its standard deviation by 20% in the eastern Mediterranean. We have examined how these changes may affect herbaceous aboveground net primary production (ANPP) and its inter-annual coefficient of variation (CV) in natural rangelands along a d...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-015-3234-5
更新日期:2015-04-01 00:00:00
abstract::Predators attack and plants defend, so herbivores face the dilemma of how to eat enough without being eaten. But do differences in the personality of herbivores affect the foraging choices of individuals? We explored the ecological impact of personality in a generalist herbivore, the brushtail possum (Trichosurus vulp...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-014-3110-8
更新日期:2015-01-01 00:00:00
abstract::While trying to achieve their nutritional requirements, foraging herbivores face the costs of plant defenses, such as toxins. Teasing apart the costs and benefits of various chemical constituents in plants is difficult because their chemical defenses and nutrient concentrations often co-vary. We used an approach deriv...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-014-2980-0
更新日期:2014-08-01 00:00:00
abstract::Resource competition is commonly invoked to explain negative effects of invasive plants on native plant abundance. If invasives out-compete natives, global changes that elevate resource availability may interact with invasives to exacerbate impacts on native communities. Indeed, evidence is accumulating that elevated ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-007-0697-z
更新日期:2007-07-01 00:00:00
abstract::Arthropods and pathogens damage leaves in natural ecosystems and may reduce photosynthesis at some distance away from directly injured tissue. We quantified the indirect effects of naturally occurring biotic damage on leaf-level photosystem II operating efficiency (Phi(PSII)) of 11 understory hardwood tree species usi...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-006-0444-x
更新日期:2006-08-01 00:00:00
abstract::Pycnogonum litorale has a terminal anecdysis. After attaining maturity it does not moult again. Maturity can be attained at different body size, the female usually being larger than the male.The pre-adult instar can also be entered at various body sizes. The duration of the pre-adult instar depends upon body size: At ...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00345215
更新日期:1971-09-01 00:00:00
abstract::In white pine (Pinus strobus) seedlings grown in five forest soils from New York State, net photosynthetic capacity (Amax) plant-1 was correlated with total foliar N plant-1 (r 2=0.57), but was more highly correlated with total foliar P plant-1 (r 2=0.82). There was no relationship (r 2<0.01) between Amax [g leaf]-1 a...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00380920
更新日期:1988-10-01 00:00:00
abstract::This study quantified both the age- and sex-specific survival rates of juveniles and adults, and tested for interannual differences in age-specific survival rates of the southern elephant seal population at Marion Island. Pups were tagged on an annual basis from 1983 onwards at Marion Island, and a consistent recaptur...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s004420050922
更新日期:1999-11-01 00:00:00
abstract::Plants of the cerrado tree species Qualea grandiflora and the annual herb Bidens gardneri were grown from seed in controlled environment rooms at 30/20° C and 12 hour photoperiod. Seedlings were grown in pots or small tubes containing sand and provided with various amounts of mineral solutions based on the formulation...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00318536
更新日期:1990-01-01 00:00:00
abstract::This study assessed the effect of nutrient enrichment on organic matter breakdown in an alpine springbrook, using alder leaf packs to which phosphorus and nitrogen were added in the form of slow-release fertilizer briquettes. The breakdown of leaf packs with nutrients added (k=0.0284 day-1) was significantly faster th...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/PL00008854
更新日期:2000-02-01 00:00:00
abstract::The identification of potential competitors has been driven by the concept of limiting similarity. Lacking are explicit tests of interaction strength among morphologically similar and dissimilar species. I used the mottled sculpin, Cottus bairdi, as a focal species in an artificial stream experiment designed to compar...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/BF00365559
更新日期:1995-09-01 00:00:00
abstract::Small forest dwelling mammals are considered to be major consumers and vectors of hypogeous ectomycorrhizal (ECM) fungi, which have lost the ability of active spore discharge. Fungal spore dispersal by mycophagy is deemed an important process involved in forest regeneration, resilience and vitality, primarily based on...
journal_title:Oecologia
pub_type: 杂志文章
doi:10.1007/s00442-012-2303-2
更新日期:2012-10-01 00:00:00