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123 results for “Trait correlation”

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dryad32/100

Data from: Convergent and correlated evolution of major life-history traits in the angiosperm genus Leucadendron (Proteaceae)

Natural selection is expected to cause convergence of life histories among taxa as well as correlated evolution of different life-history traits. Here, we quantify the extent of convergence of five key life-history traits (adult fire survival, seed storage, degree of sexual dimorphism, pollination mode, and seed-dispersal mode) and test hypotheses about their correlated evolution in the genus Leucadendron (Proteaceae) from the fire-prone South African fynbos. We reconstructed a new molecular phylogeny of this highly diverse genus that involves more taxa and molecular markers than previously. This reconstruction identifies new clades that were not detected by previous molecular study and morphological classifications. Using this new phylogeny and robust methods that account for phylogenetic uncertainty, we show that the five life-history traits studied were labile during the evolutionary history of the genus. This diversity allowed us to tackle major questions about the correlated evolution of life-history strategies. We found that species with longer seed-dispersal distances tended to evolve lower pollen-dispersal distance, that insect-pollinated species evolved decreased sexual dimorphism, and that species with a persistent soil seed-bank evolved toward reduced fire-survival ability of adults.

opencc-zeroDec 2013View details →

zenodo32/100

Figure 1 in An overview of female reproductive traits in South American Mabuya (Squamata, Scincidae), with emphasis on brood size and its correlates

Figure 1. Relationship between mean brood size and maximum female size (r = 0.71, p <0.05, n = 10) in South American Mabuya species. SVL, snout–vent length.

opennotspecifiedMar 2011View details →

zenodo32/100

Figure 2 in An overview of female reproductive traits in South American Mabuya (Squamata, Scincidae), with emphasis on brood size and its correlates

Figure 2. Relationship between maximum brood size and maximum female size (r = 0.75, p = 0.01, n = 10) in South American Mabuya species. SVL, snout–vent length.

opennotspecifiedMar 2011View details →

dryad32/100

Seed dormancy and germination traits of 27 species inhabiting the degraded karst mountain from central Yunnan-Guizhou Plateau: Seed mass and moisture content correlates with germination capacity

<p>Seed dormancy and germination play an important roles in regulating germination timing and plant fitness in harsh environment, especially for fragile karst region. Broadening the knowledge regarding seed ecology of native plant species can improve local restoration management due to the increased biodiversity and success of seedling establishment, yet few studies have addressed this. We examined the dormancy types and germination responses to temperature regimes as well as light conditions of totally 27 that were dominant or common species inhabiting a degraded karst mountain from central Yunnan-Guizhou Plateau and assessed the relationships between seed traits and germination index using a partial least squares regression (PLSR). Approximately 48% of the investigated species exhibited physiological dormancy, 37% exhibited nondormancy, 7% exhibited morphophysiological dormancy, 4% exhibited morphological dormancy and 4% exhibited physical dormancy. Germination behaviors occurred in 16 of 27 species. The seed germination of 13 species strongly responded to seasonal temperature regimes, whereas 12 species were substantially affected by light conditions. About 94% species germinated to the maximum percent in warm temperature regimes (20/13 and 25/18 °C), while the remaining was in cool temperature regime (10/4 °C). The PLSR analysis indicated a significant positive correlation between seed mass and T50 m (time to 50% final germination), and a negative correlation between seed moisture content and percent germination, showing that small seeds, particularly those with a low moisture content, were more likely to have a greater germination capacity (including relative less germination time and higher germination percent) than large seeds in harsh karst environments. In general, these results strengthen the understanding of seed dormancy classification of dormant species and germination requirements of nondormant ones that representative of pioneer species of early stage of positive succession in seriously degraded sites and provide suggestion for species selection in local seed-based vegetation restoration.</p>

opencc-zeroDec 2022View details →

dryad32/100

Data for: Decomposability of leaf and wood litter are not correlated across species: Effects of litter traits on decomposition in field and laboratory conditions

<ol> <li>Changes in tree species composition have important effects on the overall rate of litter decomposition at a community level because litter decomposability varies among species and between leaf and wood litter. To understand how changes in tree species composition affect litter dynamics and carbon sequestration at the ecosystem level, it is important to clarify interspecific variations in leaf and wood litter decomposability and the traits driving the variation.</li> <li>Using field data, field experiments, and laboratory experiments, we explored rates of leaf and wood litter decomposition and their relationships to traits of ten deciduous hardwood species in a temperate forest in Japan. Rates of leaf and wood litter decomposition at the community level were also estimated by considering species-specific litter inputs and decomposition rates.</li> <li>Rates of leaf and wood litter decomposition were not correlated under either field or controlled laboratory conditions. This is probably because the traits that affect decomposition rate differ between leaf and wood litter. Interspecific variation in litter decomposability of leaves and wood was generally consistent between field conditions and laboratory experiments using a single fungus, suggesting that the decomposing fungi set the species-specific decomposition rates. Moreover, the leaf and wood traits that affected decomposition by their specific fungi were different. The aboveground input of wood litter was less than half that of leaf litter, but its half-life was >3 times longer, suggesting that wood and leaves make similar contributions to litter accumulation.</li> <li>Focusing on either leaf or wood litter alone may produce misleading estimates of how species composition changes affect litter dynamics at the community level. Our results provide insight into predicting the response of carbon dynamics to future climate change.</li> </ol>

opencc-zeroOct 2023View details →

ClinicalTrials.gov32/100

Correlation Between Upper Airway Endoscopy and Physiological Traits of Obstructive Sleep Apnea

ClinicalTrials.gov study NCT04753684. IPD Sharing: Not stated. Countries: 1. Publications: 1.

restrictedIPD-UNDECIDEDFeb 2026View details →

dryad32/100