7 documents found, page 1 of 1
The biogeography of community assembly: latitude and predation drive variation ...
Gross, Collin P.; Duffy, J. Emmett; Hovel, Kevin A.; Kardish, Melissa R.; Reynolds, Pamela L.; Boström, Christoffer; Boyer, Katharyn E.; Cusson, MathieuWhile considerable evidence exists of biogeographic patterns in the intensity of species interactions, the influence of these patterns on variation in community structure is less clear. Studying how the distributions of traits in communities vary along global gradients can inform how variation in interactions and other factors contribute to the process of community assembly. Using a model selection approach on ...
A Pleistocene legacy structures variation in modern seagrass ecosystems
Duffy, J. Emmett; Stachowicz, John J.; Reynolds, Pamela L.; Hovel, Kevin A.; Jahnke, Marlene; Sotka, Erik E.; Boström, Christoffer; Boyer, Katharyn E.Distribution of Earth's biomes is structured by the match between climate and plant traits, which in turn shape associated communities and ecosystem processes and services. However, that climate-trait match can be disrupted by historical events, with lasting ecosystem impacts. As Earth's environment changes faster than at any time in human history, critical questions are whether and how organismal traits and ec...
Inhalation of peptide-loaded nanoparticles improves heart failure
Miragoli, Michele; Ceriotti, Paola; Iafisco, Michele; Vacchiano, Marco; Salvarani, Nicolò; Carullo, Pierluigi; Ramírez-Rodríguez, Gloria BelénPeptides are highly selective and efficacious for the treatment of cardiovascular and other diseases. However, it is currently not possible to administer peptides for cardiac-targeting therapy via a noninvasive procedure, thus representing scientific and technological challenges. We demonstrate that inhalation of small (<50 nm in diameter) biocompatible and biodegradable calcium phosphate nanoparticles (CaPs) a...
Latitude, temperature, and habitat complexity predict predation pressure in eel...
Reynolds, Pamela L.; Stachowicz, John J.; Hovel, Kevin; Bostrom, Christoffer; Boyer, Katharyn; Cusson, Mathieu; Eklof, Johan S.; Engel, Friederike G.Latitudinal gradients in species interactions are widely cited as potential causes or consequences of global patterns of biodiversity. However, mechanistic studies documenting changes in interactions across broad geographic ranges are limited. We surveyed predation intensity on common prey (live amphipods and gastropods) in communities of eelgrass (Zostera marina) at 48 sites across its Northern Hemisphere rang...
Solving Hard Stable Matching Problems via Local Search and Cooperative Parallel...
Munera, Danny; Diaz, Daniel; Abreu, Salvador; Rossi, Francesca; Saraswat, Vijay; Codognet, PhilippeStable matching problems have several practical applications. If preference lists are truncated and contain ties, finding a stable matching with maximal size is computationally difficult. We address this problem using a local search technique, based on Adaptive Search and present experimental evidence that this approach is much more efficient than state-of-the-art exact and approximate methods. Moreover, parall...
A Local Search Algorithm for SMTI and its extension to HRT Problems
Munera, Danny; Diaz, Daniel; Abreu, Salvador; Rossi, Francesca; Saraswat, Vijay; Codognet, PhilippeHospitals/Residents with Ties (HRT) forms a class of problems with many applications, some of which are of considerable size. Solving these problems has been shown to be NP-hard. In previous work, we developed a local search algorithm which displays very high performance in solving Stable Matching with Ties and Incomplete lists (SMTI) problems. In this paper, we propose a method to tackle HRT problems with a sl...
Use of hierarchical designs to detect scales of heterogeneity in the invasive s...
Olabarria, Celia; Rossi, Francesca; Rodil, Ivan F.; Quintas, Patricia; Troncoso, Jesús S.Invasion of alien species poses serious threats to many ecosystems. Despite the potential of Sargassum muticum to spread and invade new areas, no attention has been given to the study of variability of structural or morphological features across different spatial scales. We employed a hierarchical sampling design to examine patterns of spatial variability of fertility and morphological variables of S. muticum o...