Cross site investigation using LTER Data.

Synthesizing population and community synchrony to understand drivers of ecological stability across LTER sites

Gammarid amphipod.

Project Summary: Understanding factors that influence ecological stability is a key question in ecology. Population ecology has highlighted that synchrony within a species over space is an important indicator of species stability. Community ecology, in contrast, has highlighted that asynchrony between species within space may enhance the stability of aggregate properties (such as total productivity)…. Read more »

Scaling-Up Productivity Responses to Changes in Biodiversity

experimental plots with a variety of old field species

Project summary: Although hundreds of short-term local experiments indicate that random changes in biodiversity can cause substantial changes in primary productivity, considerable debate remains regarding whether these influences of biodiversity are weaker or stronger at larger spatial and temporal scales in natural ecosystems. Given this knowledge gap, current models often implicitly assume no influence of biodiversity… Read more »

Advancing soil organic matter research: Synthesizing multi-scale observations, manipulations & models

deep soil profile, rich in organic matter, with grain growing on top

Soil organic matter is a massive storehouse for carbon, as well as a key regulator of nutrient cycling and soil quality in terrestrial ecosystems, yet ecology lacks a full understanding of the controls on stabilization and breakdown of soil organic matter. Two sets of competing theories underlie models that adequately predict site-specific dynamics, but result… Read more »

Global Patterns in Stream Energy and Nutrient Cycling

stream running through wetland

Project summary: Dissolved organic matter (DOM) provides a significant source of energy and nutrients to ecosystems and its biogeochemical cycling is inextricably linked to dissolved inorganic nitrogen (DIN). In stream ecosystems in particular, there is considerable spatial and temporal variation in the relationships between the different fractions of DOM (dissolved organic carbon and nitrogen) and DIN…. Read more »

Integrating plant community and ecosystem responses to chronic global change drivers: Toward an explanation of patterns and improved global predictions

Three individuals collecting samples in desert brush.

Project Summary: Many global change drivers (GCDs) lead to chronic alterations in resource availability. As communities change through time in response to these GCDs, the magnitude and direction of ecosystem responses is also predicted to change in a non-linear fashion. We propose to examine whether plant community dynamics are predictive of shifts in ecosystem function… Read more »

Synthesis and Establishment of Guidelines Toward the Management of Next-Generation Sequence Data

Long-term ecological studies have expanded our view of microbial biology with the incorporation of long-term monitoring programs of diversity, plant and animal ecology, and decomposition processes in the context of global climate change.

The full integration of meaningful cross-site ecological-genomic studies into LTER research will require either substantial new infrastructure or access to existing infrastructure in terms of both sequencing technology and data handling.

Quantifying Uncertainty in Ecosystem Studies

The goal of this synthesis is to evaluate uncertainty in hydrologic inputs, outputs, and net hydrologic flux of major elements across small watersheds with diverse characteristics.

The long-term goal of this project is to contribute to a cultural change in ecology that makes uncertainty analysis an accepted and expected practice in the construction of ecosystem budgets.

Long-term Experiments in the LTER Network: Synthesis and Hypothesis Testing

We are requesting funds to assemble a working group of LTER scientists with extensive experience in conducting long-term experiments in the LTER Network, the skills and interest in synthetically interpreting the results of those experiments, and in using data from these studies to address new questions relevant to pressing global change issues.

Forecasting Rates of Riverine Leaf Litter Decomposition in Response to Inland Climate Change

Recent work has suggested that freshwater ecosystems may play a significant role in the global carbon cycle, potentially emitting 1.2 Pg C y-1 to the atmosphere [1, 2]. The majority of the CO2 that is degassed from streams and rivers comes from the decomposition of allochthonous leaf litter inputs [3, 4]. The process of decomposition fuels aquatic food webs, helps to regulate surface water acidity, and links biogeochemical cycles [5, 6].