Browsing by people, organizations and landmarks: century:
Testing a global standard for quantifying species recovery and assessing conservation impact (3.102236)
Date: 2021Creator: Alvarez-Clare, Silvia, Carrero, Christina
Type: Article
Manual de propagación de Quercus: Una guía fácil y rápida para cultivar encinos en México y América Central. (3.102452)
Date: 2020Creator: Alvarez-Clare, Silvia, Beckman Bruns, Emily, Byrne, Amy , Carrero, Christina, Paist, Sue, Westwood, Murphy
Type: Book
In Defense of Plants, Episode 302: Community-Based Oak Conservation (3.103259)
Date: January 31 2021Type: Audio
Description:Recording of the podcast In Defense of Plants, episode 302, titled, "Community-Based Oak Conservation". Features Tree Conservation Ecologist Silvia Alvarez-Clare discussing community-based projects aimed at saving Quercus brandegeei and Quercus insignis.
Arbor Day 2022, The Morton Arboretum at Chicago White Sox (3.103263)
Date: April 29 2022Type: Photographic image
Description:Images from Arbor Day 2022 at the Chicago White Sox game at which The Morton Arboretum had a presence. Includes images of Dr. Silvia Alvarez-Clare throwing the first pitch, signage, and a team of staff members representing The Morton Arboretum at a booth.
Saving the Arroyo Oak: Local Partners Key to Conservation Efforts (3.104333)
Date: February 21 2022Type: Document
Description:Copy of a post from the blog series, When Trees Talk, about Director of The Morton Arboretum's Global Tree Conservation Program (GTCP) Silvia Alvarez-Clare and her work in Latin American countries to prevent the extinction of threatened tree species.
Foliar Nutrient Concentrations of Understory Plants in a Chronically Fertilized Lowland Tropical Wet Forest in Costa Rica (3.57734)
Date: 2018Type: Dataset
Description:
Nutrient availability influences key processes for plants in all ecosystems with nitrogen (N) and phosphorus (P) most limiting terrestrial ecosystems. Foliar N and P concentrations have been commonly used as indicators of plant nutritional status. Tropical forests are known to have the highest foliar N:P globally which mirrors a greater degree of P limitation compared to other forests. We tested how plants respond to chronic N and P fertilization by analyzing soil and foliar N and P concentrations from a long term fertilization experiment in Costa Rica. As foliar nutrient concentrations often reflect soil nutrient availability, we had found that this may not have been the case for our samples. Total soil N had not changed significantly but foliar N was affected. We also found that available soil P had increased with chronic fertilization but foliar P was unaffected. There was an overall species effect on foliar nutrient concentrations reflecting the plant specific response to nutrient additions. Here we have added to the knowledge of how plants in tropical forests respond to changes in nutrient availability is important to predict how they will respond to anthropogenic alterations in nutrient cycles, such as N deposition.
A New Framework for Evaluating Estimates of Symbiotic Nitrogen Fixation in Forests (3.60006)
Date: 2018Creator: Alvarez-Clare, Silvia
Type: Article
Biogeochemical recuperation of lowland tropical forest during succession (3.67070)
Date: 2019Creator: Alvarez-Clare, Silvia
Type: Article
Tree Growth Data (3.67114)
Date: 2019Type: Dataset
Description:Tropical rainforests provide a multitude of ecosystem services and hold a large role in the global carbon cycle, but they are currently under threat by deforestation and anthropogenic influences. Understanding factors that increase tree growth can help protect and conserve tropical ecosystems. The Earth Forest Fertilization Experiment (EFFEX) is a nitrogen (N) and phosphorus (P) nutrient addition experiment that has been conducted at EARTH University located in Guacimo, Limon, Costa Rica. It is a full factorial block setup with 24 plots that have been fertilized twice per year since 2007 and where a variety of biological parameters have been measured, including diameter at breast height (dbh) of all trees larger than 10cm dbh. Our study explores how the effects of chronic fertilization affect tree growth over a decade. We hypothesized that P treatment would result in increased mean growth rates because P is thought to be a limiting nutrient in lowland tropical rainforests. However, we found that there is not a significant effect of additional nutrient application and tree growth at the community level. This may be attributed to Liegis law of the minimum due to another limiting resource that is preventing an increase in biomass and primary productivity. At the species level, there was not a significant effect of additional nutrient application and tree growth for Pentaclethra macroloba. There was a significant effect of additional nutrient application of N and P separately for Socratea exorrhiza. Our results can be used to better understand resource limitation in tropical rainforests and competition between neighboring trees.
Exploring Barriers to Recruitment of Transplanted Seedlings of the Endangered Quercus Brandegeei (3.91115)
Date: 2020Type: Video
Description:Maddie Fernandez, a student in the 2020 Research Experiences for Undergraduates (REU) program, giving the presentation "Exploring Barriers to Recruitment of Transplanted Seedlings of the Endangered Quercus Brandegeei" as part of the 2020 REU Symposium.
Evergreen: The Virtual Gala for The Morton Arboretum, Promotional Video (3.92700)
Date: September 2020Creator: The Morton Arboretum
Type: Video
Description:A video featuring Arboretum members and staff, promoting the Evergreen Gala and encouraging support for The Morton Arboretum.
Demography of an Endangered Oak (3.92723)
Date: 2020Type: Video
Description:Camila Cortez, a student in the 2020 Research Experiences for Undergraduates (REU) program, giving the presentation "Demography of an Endangered Oak" as part of the 2020 REU Symposium.
[Tree Conservation Ecology Group - Population Distribution of Quercus brandegeei] (3.92724)
Date: 2020Type: Video
Description:Carolyn Brinckwirth, a student in the 2020 Research Experiences for Undergraduates (REU) program, giving the presentation as part of the REU Tree Conservation Ecology Group in the 2020 REU Symposium.
Silvia Alvarez-Clare collecting soils for nutrient analysis (3.96759)
Date: December 28 2020Type: Photographic image
Description:Silvia Alvarez-Clare collecting soils for nutrient analysis for the "Earth Forest Fertilization Experiment (EFFEX)" project.
A liana in the Costa Rica (3.96763)
Date: October 30 2020Creator: Alvarez-Clare, Silvia
Type: Photographic image
Description:A liana in the rainforest where the "Earth Forest Fertilization Experiment (EFFEX)" is located.
Cattle grazing under Quercus brandegeei Goldman (cape oak) trees (3.96811)
Date: March 26 2017Creator: Denvir, Audrey
Type: Photographic image
Description:Cattle grazing under Quercus brandegeei Goldman (cape oak) trees. Cattle grazing and trampling is one of the main threats for this species.
Collecting acorns during the pandemic in 2020, Costa Rica (3.96830)
Date: July 22 2020Type: Photographic image
Description:Collecting acorns during the pandemic in 2020, Costa Rica
Local partners planting acorns (3.96831)
Date: August 29 2020Type: Photographic image
Description:Local partners planting acorns
Workshop participants at first Oaks of the Americas Conservation Network (OACN) meeting (3.96841)
Date: March 15 2016Creator: Denvir, Audrey
Type: Photographic image
Description:Worskshop participants at first OACN meeting