Article
Ecology
Eliseo Fica-Rojas, Alexis M. Catalan, Bernardo R. Broitman, Alejandro Perez-Matus, Nelson Valdivia
Summary: Ecological stability depends on interactions between different levels of biological organization. Insurance effects occur when increasing species diversity leads to more stable community-level properties. This study investigates how species richness and population-level parameters influence community invariability.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2022)
Article
Environmental Sciences
Yuan Chi, Dahai Liu
Summary: Sandy islands are affected by multiple external disturbances, leading to drastic temporal ecological changes. In this study, a model for sandy island ecosystem health integrating the states of essential components and the resilience under multiple disturbances was established. The results showed that vegetation and soil components contributed more to ecosystem health, while human influence played a major role in driving spatiotemporal variations. Measures were proposed for managing sandy islands based on ecological protection and development.
Article
Ecology
Gregory S. Norris, Travis G. Gerwing, Diana J. Hamilton, Myriam A. Barbeau
Summary: This study investigated the factors influencing succession after disturbance in intertidal mudflats. The researchers conducted field experiments in two different locations, and found that disturbance frequency and species availability were key drivers of succession, while local interactions between species did not have a detectable effect. The study suggests that species availability plays a crucial role in shaping community composition in intertidal mudflats.
Article
Microbiology
Julius Degenhardt, Julian Merder, Benedikt Heyerhoff, Heike Simon, Bert Engelen, Hannelore Waska
Summary: Microbial communities and dissolved organic matter are closely linked in the global carbon cycle. Studying this link on a molecular level is challenging due to the complexity of the systems, but research in intertidal beach sediments has identified four distinct bacterial clusters with specific metabolic functions and distribution patterns, providing insights into their roles in the degradation of organic matter.
Article
Environmental Sciences
Kunpeng Shi, Jinyun Guo, Yongming Zhang, Wang Li, Qiaoli Kong, Teng Yu
Summary: This study utilizes GPS Radio Occultation (RO) technology and kriging interpolation to analyze the dynamic abnormalities of the ionosphere before the Chilean earthquake, showing significant disturbances in the epicenter region. The simultaneous reaction of seismo-ionosphere effects is evidenced by the fluctuations observed in the ionospheric layers.
Article
Ecology
Nelson Valdivia, Daniela N. Lopez, Eliseo Fica-Rojas, Alexis M. Catalan, Moises A. Aguilera, Marjorie Araya, Claudia Betancourtt, Katherine Burgos-Andrade, Thais Carvajal-Baldeon, Valentina Escares, Simon Gartenstein, Mariana Grossmann, Barbara Gutierrez, Jonne Kotta, Diego F. Morales-Torres, Barbara Riedemann-Saldivia, Sara M. Rodriguez, Catalina Velasco-Charpentier, Vicente Villalobos, Bernardo R. Broitman
Summary: This study in Chile demonstrates the nonlinear relationship between area and stability, showing that larger areas have better recovery abilities in terms of functioning and composition. Smaller disturbed areas tend to overcompensate in total cover, which is related to enhanced available space for recruitment and increasing beta diversity resulting from increasing area.
Editorial Material
Ecology
Ricardo A. Scrosati, Alexis M. Catalan, Nelson Valdivia
FRONTIERS IN ECOLOGY AND THE ENVIRONMENT
(2022)
Article
Ecology
Sara M. Rodriguez, James E. Byers, Fernando Cerda-Aliaga, Nelson Valdivia
Summary: This study investigated the influences of environmental factors and host biological attributes on the infection probability and abundance of parasites. The results showed that the body size of the mole crab was the primary factor affecting the infection, and increasing mole crab density led to a decrease in the abundance of acanthocephalan parasites. Co-infection was also observed among different larval parasite species. The study suggested that parasite infection in this system is more strongly related to host exposure duration rather than spatially variable environmental factors, even across large spatial scales.
MARINE ECOLOGY PROGRESS SERIES
(2022)
Article
Environmental Sciences
Nelson Valdivia, Jose Garces-Vargas, Ignacio Garrido, Ivan Gomez, Pirjo Huovinen, Nelso P. Navarro, Erasmo C. Macaya, Luis Miguel Pardo
Summary: Community assembly in sub-Antarctic and Antarctic shallow subtidal macrobenthic communities is influenced significantly by stochastic processes, with the normalized stochasticity ratio (NST) indicating a high level of stochastic assembly. Environmental factors play a minor role in spatial variation across the study sites, suggesting that stochastic processes may have a stronger influence on community composition than deterministic niche-based factors in this region. This study provides valuable insights into the major ecological processes in Southern Ocean coastal marine communities, particularly as anthropogenic biotic homogenisation continues to pose challenges.
FRONTIERS IN MARINE SCIENCE
(2021)
Article
Environmental Sciences
Barbara Riedemann-Saldivia, Joseline A. Buchner-Miranda, Luis P. Salas-Yanquin, Nelson Valdivia, Alexis M. Catalan, Ricardo A. Scrosati, Oscar R. Chaparro
Summary: This study evaluated the non-consumptive effects of a predatory snail on a dominant mussel species. The results showed that predator cues triggered behavioral changes and physiological consequences in the prey, potentially impacting ecosystem processes and community structure indirectly.
MARINE ENVIRONMENTAL RESEARCH
(2022)
Article
Forestry
Francisco Tello, Mauro E. Gonzalez, Estefania Mico, Nelson Valdivia, Fernanda Torres, Antonio Lara, Alejandra Garcia-Lopez
Summary: The occurrence of short-interval, severe wildfires is increasing globally, even in areas with historically long fire-return intervals. This study investigates the impact of recent short-interval, severe wildfires on diversity in Chilean forests. The results show that these wildfires drastically reduce species richness and alter the composition of beetle assemblages, with habitat quality and quantity playing a significant role.
Article
Plant Sciences
Fernanda P. Cid Alda, Nelson Valdivia, Marie-Laure Guillemin
Summary: This study demonstrates the presence of cryptic red algae species in the rocky intertidal zone of Chile, with distinct spatial and temporal distribution patterns. These species have similar morphologies but differ genetically. The study also suggests that intertidal elevation is the main factor affecting species composition, while seasonal variation also has a slight impact.
Article
Multidisciplinary Sciences
Gail Ashton, Amy L. Freestone, J. Emmett Duffy, Mark E. Torchin, Brent J. Sewall, Brianna Tracy, Mariano Albano, Andrew H. Altieri, Luciana Altvater, Rolando Bastida-Zavala, Alejandro Bortolus, Antonio Brante, Viviana Bravo, Norah Brown, Alejandro H. Buschmann, Edward Buskey, Rosita Calderon Barrera, Brian Cheng, Rachel Collin, Ricardo Coutinho, Luis De Gracia, Gustavo M. Dias, Claudio DiBacco, Augusto A. Flores, Maria Angelica Haddad, Zvi Hoffman, Bruno Ibanez Erquiaga, Dean Janiak, Anali Jimenez Campean, Inti Keith, Jean-Charles Leclerc, Orlando Pedro Lecompte-Perez, Guilherme Ortigara Longo, Helena Matthews-Cascon, Cynthia H. McKenzie, Jessica Miller, Martin Munizaga, Lais P. D. Naval-Xavier, Sergio A. Navarrete, Carlos Otalora, Lilian A. Palomino-Alvarez, Maria Gabriela Palomo, Chris Patrick, Cormack Pegau, Sandra Pereda, Rosana M. Rocha, Carlos Rumbold, Carlos Sanchez, Adolfo Sanjuan-Munoz, Carmen Schloder, Evangelina Schwindt, Janina Seemann, Alan Shanks, Nuno Simoes, Luis Skinner, Nancy Yolimar Suarez-Mozo, Martin Thiel, Nelson Valdivia, Ximena Velez-Zuazo, Edson A. Vieira, Bruno Vildoso, Ingo S. Wehrtmann, Matt Whalen, Lynn Wilbur, Gregory M. Ruiz
Summary: A study found that marine predators in tropical waters have higher consumption rates and stronger impacts on the biomass and species composition of marine invertebrate communities, possibly due to the presence of fish predators.
Article
Ecology
Eliseo Fica-Rojas, Alexis M. Catalan, Bernardo R. Broitman, Alejandro Perez-Matus, Nelson Valdivia
Summary: Ecological stability depends on interactions between different levels of biological organization. Insurance effects occur when increasing species diversity leads to more stable community-level properties. This study investigates how species richness and population-level parameters influence community invariability.
FRONTIERS IN ECOLOGY AND EVOLUTION
(2022)
Article
Biodiversity Conservation
Mariana Grossmann, Sven N. Nielsen, Marcelo M. Rivadeneira, Nelson Valdivia
Summary: Understanding latitudinal variations in biodiversity is essential for biogeography. In the coast of the Southeast Pacific, it is observed that several taxa exhibit increasing species numbers from lower to higher latitudes. This phenomenon can be explained by the presence of fjords formed during glaciations, which increased the diversity of available biotopes and allowed higher diversity in high latitudes. This research focuses on analyzing latitudinal patterns of functional diversity in the fossil record before the formation of fjords in order to assess this hypothesis.
Article
Multidisciplinary Sciences
Victor M. Cubillos, Felipe E. Ramirez, Daniela A. Mardones-Toledo, Nelson Valdivia, Oscar R. Chaparro, Jaime A. Montory, Edgardo A. Cruces
Summary: The bathymetric distribution of the estuarine anemone Anthopleura hermaphroditica determines its capacity to cope with environmental fluctuations. Intertidal individuals exhibit higher tolerance to temperature, salinity, and radiation stressors, resulting in lower levels of oxidative damage and higher antioxidant capacity compared to subtidal individuals. This suggests that intertidal individuals have greater adaptability to environmental variations.
Article
Ecology
Maria Jose Diaz, Christian Buschbaum, Paul E. Renaud, Nelson Valdivia, Markus Molis
Summary: Predation plays a crucial role in shaping the marine benthic communities and influencing the population dynamics of prey species in tropical and temperate coastal systems. However, there is limited information about its magnitude in the Arctic coastal habitats, which have been understudied. In order to investigate the effects of predation on the diversity and structure of Arctic benthic communities, caging experiments were conducted in two intertidal sedimentary sites in Svalbard for a duration of 2.5 months. The exclusion of predators had minimal effects on the biomass, abundance, species richness, evenness, and Shannon Index of the communities. Additionally, cage effects and spatial variability in the intensity of predation effects were observed. The study suggests that predators have limited impacts on the structure of the studied intertidal macrobenthic Arctic communities, which is different from coastal soft-bottom ecosystems at lower latitudes.
ECOLOGY AND EVOLUTION
(2023)
Article
Ecology
Diego F. Morales-Torres, Nelson Valdivia, Sara M. Rodriguez, Juan G. Navedo
Summary: The profitability of prey and handling time are important factors in prey selection. Large prey are more profitable and increase competition among consumers. This study focuses on kleptoparasitism occurrence by the Brown--Hooded Gull on Whimbrels preying on Mole Crabs, revealing the positive relationship between handling time and kleptoparasitism probability.
Article
Ecology
Alexis M. Catalan, Daniela N. Lopez, Eliseo Fica-Rojas, Bernardo R. Broitman, Nelson Valdivia, Ricardo A. Scrosati
Summary: This study investigated the effect of canopy-forming alga on spatial environmental heterogeneity and beta diversity in intertidal communities. Canopy cover was found to reduce the spatial variation of temperature and desiccation, resulting in lower beta diversity for sessile species but not for mobile species.
Meeting Abstract
Plant Sciences
R. Eliseo Fica, Daniela N. Lopez, Nelson Valdivia