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Hubbard Brook site, station Vegetation zone 5 at Hubbard Brook Experimental Forest's watershed 6, study of diameter at breast height of Acer rubrum (red maple) in units of centimeter on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Hubbard Brook (HBR) contains diameter at breast height of Acer rubrum (red maple) measurements in centimeter units and were aggregated to a yearly timescale.

Hubbard Brook site, station Vegetation zone 5 at Hubbard Brook Experimental Forest's watershed 6, study of diameter at breast height of Acer saccharum (sugar maple) in units of centimeter on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Hubbard Brook (HBR) contains diameter at breast height of Acer saccharum (sugar maple) measurements in centimeter units and were aggregated to a yearly timescale.

Hubbard Brook site, station Vegetation zone 4 at Hubbard Brook Experimental Forest's watershed 6, study of diameter at breast height of Acer pensylvanicum (striped maple) in units of centimeter on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Hubbard Brook (HBR) contains diameter at breast height of Acer pensylvanicum (striped maple) measurements in centimeter units and were aggregated to a yearly timescale.

Hubbard Brook site, station Vegetation zone 4 at Hubbard Brook Experimental Forest's watershed 6, study of diameter at breast height of Acer rubrum (red maple) in units of centimeter on a yearly timescale

Hubbard Brook site, station Vegetation zone 4 at Hubbard Brook Experimental Forest's watershed 6, study of diameter at breast height of Acer saccharum (sugar maple) in units of centimeter on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Hubbard Brook (HBR) contains diameter at breast height of Acer saccharum (sugar maple) measurements in centimeter units and were aggregated to a yearly timescale.

Hubbard Brook site, station Vegetation zone 1 at Hubbard Brook Experimental Forest's watershed 6, study of diameter at breast height of Acer pensylvanicum (striped maple) in units of centimeter on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Hubbard Brook (HBR) contains diameter at breast height of Acer pensylvanicum (striped maple) measurements in centimeter units and were aggregated to a yearly timescale.

Hubbard Brook site, station Vegetation zone 1 at Hubbard Brook Experimental Forest's watershed 6, study of diameter at breast height of Acer rubrum (red maple) in units of centimeter on a yearly timescale

Hubbard Brook site, station Vegetation zone 1 at Hubbard Brook Experimental Forest's watershed 6, study of diameter at breast height of Acer saccharum (sugar maple) in units of centimeter on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Hubbard Brook (HBR) contains diameter at breast height of Acer saccharum (sugar maple) measurements in centimeter units and were aggregated to a yearly timescale.

Harvard Forest site, station Harvard Forest's Lyford Blocks within the Prospect Hill Tract, study of diameter at breast height of Acer pensylvanicum (striped maple) in units of centimeter on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Harvard Forest (HFR) contains diameter at breast height of Acer pensylvanicum (striped maple) measurements in centimeter units and were aggregated to a yearly timescale.

Harvard Forest site, station Harvard Forest's Lyford Blocks within the Prospect Hill Tract, study of diameter at breast height of Acer rubrum (red maple) in units of centimeter on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Harvard Forest (HFR) contains diameter at breast height of Acer rubrum (red maple) measurements in centimeter units and were aggregated to a yearly timescale.

Harvard Forest site, station Harvard Forest's Lyford Blocks within the Prospect Hill Tract, study of diameter at breast height of Acer saccharum (sugar maple) in units of centimeter on a yearly timescale

The EcoTrends project was established in 2004 by Dr. Debra Peters (Jornada Basin LTER, USDA-ARS Jornada Experimental Range) and Dr. Ariel Lugo (Luquillo LTER, USDA-FS Luquillo Experimental Forest) to support the collection and analysis of long-term ecological datasets. The project is a large synthesis effort focused on improving the accessibility and use of long-term data. At present, there are ~50 state and federally funded research sites that are participating and contributing to the EcoTrends project, including all 26 Long-Term Ecological Research (LTER) sites and sites funded by the USDA Agriculture Research Service (ARS), USDA Forest Service, US Department of Energy, US Geological Survey (USGS) and numerous universities. Data from the EcoTrends project are available through an exploratory web portal (http://www.ecotrends.info). This web portal enables the continuation of data compilation and accessibility by users through an interactive web application. Ongoing data compilation is updated through both manual and automatic processing as part of the LTER Provenance Aware Synthesis Tracking Architecture (PASTA). The web portal is a collaboration between the Jornada LTER and the LTER Network Office. The following dataset from Harvard Forest (HFR) contains diameter at breast height of Acer saccharum (sugar maple) measurements in centimeter units and were aggregated to a yearly timescale.

openCC (other)Jan 2020View details →

Health and mycorrhizal colonization response of sugar maple (Acer saccharum) seedlings to calcium addition in Watershed 1 at the Hubbard Brook Experimental Forest

We examined the health and mycorrhizal colonization rates of sugar maple germinants on a Calcium (Ca)- treated watershed at Hubbard Brook Experimental Forest and compared their status to the health of seedlings growing on reference sites. We quantified general sugar maple germinant health by height, leaf area, biomass, and chlorophyll content. To determine vesicular-arbuscular mycorrhizal colonization rates, we first cleared and stained germinant roots and then examined their structures microscopically. We found that sugar maple seedlings on the Ca-addition site were taller, had larger leaves, more root, leaf, and stem biomass, and more chlorophyll per unit leaf area. These seedlings also had a significantly larger percentage of their roots colonized by mycorrhizal fungi. Our results indicate a correlation between soil Ca availability, mycorrhizal colonization rates, and overall seedling health. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.

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Data from: Seed quality and seed quantity in red maple depends on weather and individual tree characteristics

<p>Under future climate change, plant species are expected to shift their ranges in response to increasing temperatures and altered precipitation patterns. As seeds represent the single opportunity for plants to move, it is critical to quantify the factors that influence reproduction. While total seed production is clearly important, seed quality is equally as critical and often overlooked. Thus, to quantify how environmental and tree-level characteristics affect seed quality and quantity, the reproductive output of red maple (<i>Acer rubrum</i>) was measured along an elevation gradient in the Monongahela National Forest, WV. A variety of individual-level characteristics were measured (i.e., DBH, canopy area, tree cores), and seed traps were placed under seed-bearing trees to collect samaras and quantify total seed production. A random subsample of collected seeds from each tree were micro-CT scanned to determine embryo volume, photographed for morphology measurements, and used for germination trials. The number of seeds produced was negatively affected by frost events during flowering, and stand density. The trees with the most seeds also showed reduced growth in recent years. Only 63% of scanned seeds showed embryo development, and of those seeds – only 23% germinated. The likelihood of embryo presence increased as growth rate decreased, while embryo size increased with tree height, smaller DBH, and in areas dominated by hemlock. Both larger embryo volume and larger overall seed size increased the likelihood of germination. The results highlight the importance of including seed quality in addition to seed quantity for a more complete representation of reproductive output.</p>

opencc-zeroSep 2021View details →

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Data from: Linking songbird nest predation to seedling density: sugar maple masting as a resource pulse in a forest food web

The ecological literature presents considerable evidence for top-down forcing on the maintenance of species diversity. Yet, in temperate forests, bottom-up forces often exert a strong influence on ecosystem functioning. Here, we report on the indirect influence of a pulsed resource, sugar maple (Acer saccharum) seed production, on nest survival in a migratory songbird. We hypothesized that seed production in year t would determine daily nest survival rate in year t + 1 through its effects on seed-eating rodents. We used the density of sugar maple seedlings (with cotyledons) in year t + 1 as a proxy for seed production in year t and predicted that it would be inversely related to songbird nest survival the same year. We estimated the density of sugar maple seedlings, eastern chipmunk (Tamias striatus) activity, and daily nest survival rate in the ovenbird (Seiurus aurocapilla) over four successive years in a northern hardwood forest of New Brunswick, Canada. Seedling density varied by two orders of magnitude between years, whereas an index of chipmunk activity changed by an order of magnitude. Both variables were positively correlated and negatively correlated to daily nest survival rate. A logistic-exposure model including only seedling density received the greatest level of support (lowest AICc). Previous studies have reported the effect of sugar maple masting on seed-eating rodent populations, but the strong link we report between seedling density and songbird nest survival is novel. A nocturnal seed-eating nest predator, deer mouse (Peromyscus maniculatus), was not considered in our models, which may explain why chipmunk was not the best predictor of daily nest survival rate. The trophic linkages we observed are remarkably strong for a temperate forest ecosystem and might become more prevalent in northeastern North America, at least on calcium-rich soils, with the loss of large-diameter beech trees as a result of beech bark disease.

opencc-zeroDec 2016View details →

opennotspecifiedMar 2022View details →

FIGURE 2. Acer yui. A in Supplementary description of floral characters and nomenclatural note for the rare maple Acer yui W.P.Fang (Sapindaceae) from western China

FIGURE 2. Acer yui. A. Habitat; B. Flowering plant; C. Trunks showing the bark; D. Branchs with inflorescence; E. Leaf blade variations. F. Infructescence; G. Abaxial leaf surface.

opennotspecifiedMar 2022View details →

FIGURE 3. Acer yui. A in Supplementary description of floral characters and nomenclatural note for the rare maple Acer yui W.P.Fang (Sapindaceae) from western China

FIGURE 3. Acer yui. A. Male flower branch; B. Female flower branch; C. Inflorescence with staminate flowers; D. Involucrate bracts; E. A pistillate flower; F. Sepals of a female flower; G. Petals of pistillate flower; H. Ovary and staminodes of a pistillate flower; I. A staminate flower; J. Sepals of a staminate flower; K. Petals of a staminate flower; L. Stamens and disk of a staminate flower.

FIGURE 6 in Micromorphological studies of leaf epidermal features in populations of maples (Acer L.) from Iran

FIGURE 6. Hierarchical clustering of the studied taxa based on the results of Multivariate mixed data analysis under Gower similarity index.

FIGURE 3 in Micromorphological studies of leaf epidermal features in populations of maples (Acer L.) from Iran

FIGURE 3. SEM micrographs of Acer species, A–B, A. campestre; C–D, A. cappadocicum; E–F, A. hyrcanum; G, A. mazandaranicum; H, A. platanoides; I, A. tataricum; J–P, A. monspessulanum; Q–R, A. velutinum. For all SEM micrographs Scale bar = 100 μm.

FIGURE 2 in Micromorphological studies of leaf epidermal features in populations of maples (Acer L.) from Iran

FIGURE 2. Stomatal complex of Acer species, A–B, A. campestre; C–D, A. cappadocicum; E–F, A. hyrcanum; G: A. mazandaranicum; H, A. platanoides; I, A. tataricum; J–P, A. monspessulanum; Q–R, A. velutinum.

FIGURE 1 in Micromorphological studies of leaf epidermal features in populations of maples (Acer L.) from Iran

FIGURE 1. Distribution map of georeferenced localities of studied populations and their voucher data.