Article
Multidisciplinary Sciences
Peter Jeffrey Williams, Robert C. Ong, Jedediah F. Brodie, Matthew Scott Luskin
Summary: The field experiment in Borneo showed that the removal of large seed consumers can be functionally compensated by insects and fungi, maintaining seed survival and seedling establishment. The loss of seeds in defaunated systems does not affect seedling establishment.
NATURE COMMUNICATIONS
(2021)
Review
Plant Sciences
Y. Anny Chung
Summary: Feedbacks between plants and soil microbes are crucial to terrestrial community and ecosystem dynamics. Recent advancements in understanding the spatial and temporal dynamics of plant-soil feedbacks have challenged traditional assumptions, highlighting the importance of considering the mismatch in spatial and temporal scales. A proposed spatiotemporal framework, combining experimental and modeling approaches, aims to improve predictability and generalizability of plant-soil feedbacks.
Article
Ecology
Feng Jiang, James A. Lutz, Qingxi Guo, Zhanqing Hao, Xugao Wang, Gregory S. Gilbert, Zikun Mao, David A. Orwig, Geoffrey G. Parker, Weiguo Sang, Yankun Liu, Songyan Tian, Marc W. Cadotte, Guangze Jin
Summary: Recent studies show that tree mycorrhizal type plays a crucial role in influencing CNDD strength and species richness, with AM tree species showing stronger CNDD and positive relationship with species abundance compared to ECM tree species. Additionally, ECM tree dominance negatively affects plant richness across plots.
Article
Ecology
Nazrin Malik, David Edwards, Robert P. Freckleton
Summary: The Janzen-Connell hypothesis suggests that specialist natural enemies restrict competitive dominance through density and distance-dependent mortality. However, empirical evidence for the role of distance and density-dependence in the hypothesis is still limited. This study conducted experiments in a South-East Asian system dominated by mast fruiting species and found that while survival of conspecific seedlings was reduced near certain adult trees, high densities of seedlings inhibited the growth of conspecific seedlings in both species. Additionally, herbivory rates decreased with distance in low-density areas. These findings suggest that the Janzen-Connell effects of distance and density dependence were relatively weak in this system during the growth stage studied.
ECOLOGY AND EVOLUTION
(2023)
Article
Plant Sciences
Xin Tong, John D. Nason, Yuan-Yuan Ding, Xiao-Yong Chen
Summary: The study shows that the transition from seedlings to adults in C. glauca is primarily regulated by positive density dependence rather than Janzen-Connell effects. By combining changes in FSGS with dispersal-based model tests, valuable insights into density-dependent adult recruitment can be gained. This highlights a critical gap between mechanisms at early stages and long-term population and community dynamics.
JOURNAL OF ECOLOGY
(2021)
Article
Forestry
Krzysztof Turczanski, Marcin K. Dyderski, Agnieszka Andrzejewska
Summary: The study investigated the impact of seed dispersal limitation, soil fertility, browsing, and understory vegetation on ash natural regeneration. Results showed that increased distance from seed source, better soil fertility, and sufficient light availability might enhance ash regeneration.
FOREST ECOLOGY AND MANAGEMENT
(2022)
Article
Ecology
Camille S. Delavaux, Janika K. Angst, Hilario Espinosa, Makenna Brown, Daniel F. Petticord, John W. Schroeder, Kirk Broders, Edward A. Herre, James D. Bever, Thomas W. Crowther
Summary: In this study, the researchers used a reciprocal transplant experiment and amplicon sequencing to investigate the impact of soil microbes on plant community structure and diversity. They found that plant species identity can alter the microbial community, which in turn affects the growth and survival of conspecific plants. The study also revealed that greater dissimilarity between species in their arbuscular mycorrhizal and nonpathogenic fungi predicts increased positive feedback. Additionally, specific microbial taxa that differentially accumulate under conspecific settings were identified.
Article
Ecology
Aparna Krishnan, Anand M. Osuri, Meghna Krishnadas
Summary: Seed predation and reduced predation risk with distance from conspecific trees are important factors influencing tree regeneration in tropical forests. Forest fragmentation could alter patterns of seed predation and affect tree regeneration and community dynamics.
Article
Ecology
Carrie A. Sims, Eugenia M. Sampayo, Margaret M. Mayfield, Timothy L. Staples, Steven J. Dalton, Nataly Gutierrez-Isaza, John M. Pandolfi
Summary: The study found that under controlled aquarium conditions, the settlement probability of corals was not influenced by density, but adult conspecifics and settler density had a negative impact on short-term settler survival. There was evidence of significant species interactions among propagules, and settlers showed greater spatial aggregation as their numbers increased.
Article
Ecology
Daniel J. B. Smith
Summary: Using a theoretical model, the functional form of Janzen-Connell effects (JCEs) is shown to have a significant impact on their ability to maintain species coexistence. If predation pressure increases additively with adult tree density and decays exponentially with distance, JCEs can maintain higher species richness.
Review
Ecology
Haldre S. Rogers, Isabel Donoso, Anna Traveset, Evan C. Fricke
Summary: Seed dispersal is crucial for the persistence and spread of plant populations, as most plant species rely on animals to disperse their seeds. Loss of dispersers can lead to changes in plant populations, community patterns, and ecosystem functioning.
ANNUAL REVIEW OF ECOLOGY, EVOLUTION, AND SYSTEMATICS, VOL 52, 2021
(2021)
Article
Forestry
C. Moriah Boggess, David S. Mason, Heather D. Alexander, Bronson K. Strickland, Marcus A. Lashley
Summary: Mast seeding in oaks can lead to changes in deer behavior, affecting both seed survival and seedling growth. These findings suggest that facultative consumers play an important role in connecting resource pulses to broader community dynamics.
FOREST ECOLOGY AND MANAGEMENT
(2021)
Article
Ecology
Dillon T. Fogarty, Robert B. Peterson, Dirac Twidwell
Summary: This study develops a recruitment curve to describe the scatter of woody plant recruitment around seed sources and examines how this structures spatial patterns of encroachment.
Article
Ecology
Alissa J. Brown, Peter S. White, Robert K. Peet
Summary: Conspecific negative density dependence is a key driver of tree diversity in temperate forests, influencing seedlings and saplings through the formation of enemy density halos and intraspecific competition. The response of seedlings and saplings to nearby conspecific adults is influenced by local environmental conditions such as solar radiation, soil moisture, and soil nutrients. Variations in small-scale environmental conditions, such as soil organic matter and topographic slope/aspect, can modify the interaction between tree basal area and nearby conspecific density, ultimately impacting sapling growth.
Article
Ecology
Luis Abdala-Roberts, Biiniza Perez-Nino, Carla Vazquez-Gonzalez, Jairo Cristobal-Alejo, Enrique Reyes-Novelo, Xoaquin Moreira
Summary: This study experimentally evaluated the effects of seedling density and tree diversity on plant enemies. The results showed contrasting effects of tree diversity on insects and pathogens, with no effect on insect leaf damage and a significant negative effect on leaf necrosis by pathogens. However, seedling conspecific density had no effect on either insect or pathogen damage.
Article
Ecology
Elena Quintero, Jorge Isla, Pedro Jordano
Summary: Recording species interactions, especially frugivory, is a challenge in ecological studies. Various methods have been developed for monitoring these interactions, with data merging approaches being proposed to combine results from different methodologies. Case studies show that data merging can increase the number of interactions recorded and improve the robustness of network topological descriptors.
Article
Ecology
Lisieux Fuzessy, Gisela Sobral, Daiane Carreira, Debora Cristina Rother, Gedimar Barbosa, Mariana Landis, Mauro Galetti, Tad Dallas, Vinicius Cardoso Claudio, Laurence Culot, Pedro Jordano
Summary: In the Brazilian Atlantic forest, the most important frugivorous vertebrates in the continuous forest have disappeared from the small patch, while specific functional traits and levels of frugivory play a significant role in shaping network structure. In the small patch, small generalist birds and the only remaining primate, along with lipid-rich fruits, are central to maintaining community structure.
Article
Ecology
Lisieux Fuzessy, Fernando A. O. Silveira, Laurence Culot, Pedro Jordano, Miguel Verdu
Summary: Seed dispersal benefits plants and frugivores, potentially driving co-evolution; phylogenetic congruences suggest shared evolutionary history between primates and plants; consistent eco-evolutionary dynamics with co-phylogenetic signals emerging independently across different regions.
Article
Ecology
Jose Maria Gomez, Eugene W. Schupp, Pedro Jordano
Summary: Mutualism effectiveness is defined as the contribution of an interacting organism to its partner's fitness, determined by the quantity and quality components of immediate outcomes. The spatial structure of effectiveness values reflects the evolutionary history of mutualistic interactions, with properties such as distribution, relative contribution, and correlation impacting the landscape. Exploring effectiveness landscapes in other mutualisms can provide insights into the evolutionary and ecological consequences of mutualisms.
Article
Ecology
Tad A. Dallas, Pedro Jordano
Summary: In this study, the variability in interactor richness across 299 host-helminth networks was examined using a global database of host-helminth interactions. The results showed that a signal of interactor richness conservation was not detected for more than 95% of host and helminth parasite species. Furthermore, a significant taxonomic signal was detected in the divergence of parasite species richness from a null model for host species.
GLOBAL ECOLOGY AND BIOGEOGRAPHY
(2022)
Article
Plant Sciences
Andres Barea-Marquez, Francisco J. Ocana-Calahorro, Rodrigo Balaguer-Romano, Jose Maria Gomez, Eugene W. Schupp, Raquel Sanchez-Perez, Jesus Guillamon, Joanna Zhang, Rafael Rubio de Casas
Summary: This paper examines the phenotypic and genotypic differences in fruit and seed traits during the naturalization of almond trees in SE Iberia. The results suggest that strong directional selection plays a role in the feralization process, leading to smaller and more toxic seeds encased in harder endocarps.
JOURNAL OF ECOLOGY
(2022)
Article
Ecology
Pamela Friedemann, Marina Correa Cortes, Everaldo Rodrigo de Castro, Mauro Galetti, Pedro Jordano, Paulo R. Guimaraes Jr
Summary: The study found that individual palm characteristics did not influence interaction patterns in the network, but habitat type significantly affected network modularity. This suggests that the organization of individual-based networks is mainly driven by habitat type.
Article
Ecology
Maria Campo-Celada, Pedro Jordano, Ana Benitez-Lopez, Carlos Gutierrez-Exposito, Julio Rabadan-Gonzalez, Irene Mendoza
Summary: This study evaluates the changes in an avian frugivore community in a Mediterranean scrubland site over a long-term and short-term period. The findings show profound transformations in species composition, bird phenology, and body condition. The abundance of wintering and seed-disperser species has decreased over about 40 years. Seasonal abundance peaks have advanced in many frugivorous bird species. Bird body condition during migration has worsened, with fewer individuals showing a high-fat percentage. Fruit production has also decreased, possibly due to habitat encroachment and vegetation changes.
Article
Plant Sciences
Jorge Isla, Miguel E. Jacome-Flores, Daniel Pareja, Pedro Jordano
Summary: The strength of antagonistic interactions changes during range expansion in plant populations, and individual plant traits and neighborhood attributes play a significant role in determining the configuration of these interactions. Our study highlights the importance of an individual-based approach in understanding the structure and driving factors of interactions in natural changing landscapes.
JOURNAL OF ECOLOGY
(2022)
Article
Ecology
Elena Quintero, Francisco Rodriguez-Sanchez, Pedro Jordano
Summary: Mutualistic interactions among free-living species involve low-frequency interactions and asymmetric dependence. Using a fleshy-fruited plant and its frugivore assemblage as a model, researchers found that interaction effectiveness was mainly driven by interaction frequency. Despite asymmetric dependences, reciprocity in rewards between partners was determined by the quantity of fruit consumed. They anticipate that reciprocity will emerge in low-intimacy mutualisms where interaction frequency plays a crucial role.
Article
Ecology
Blanca Arroyo-Correa, Pedro Jordano, Ignasi Bartomeus
Summary: Patterns of resource use at the species level are influenced by individual differences in exploiting available resources, such as pollinator use by plants. Our study used detailed data on plant-pollinator interactions to examine how variation in pollinator use among individual plants impacts community structure and dynamics. We found that all co-occurring plant species consisted of specialists interacting with subsets of pollinators that visited generalists, and the differences in interaction patterns were driven by variation in traits among individuals. Furthermore, communities with higher levels of variation in plant traits and pollinator use showed a nested structure and were more feasible. Our research highlights the importance of preserving intraspecific variation in traits and resource use within populations.
Article
Multidisciplinary Sciences
Lucas P. Martins, Daniel B. Stouffer, Pedro G. Blendinger, Katrin Bohning-Gaese, Galo Buitron-Jurado, Marta Correia, Jose Miguel Costa, D. Matthias Dehling, Camila Donatti, Carine Emer, Mauro Galetti, Ruben Heleno, Pedro Jordano, Icaro Menezes, Jose Carlos Morante-Filho, Marcia C. Munoz, Eike Lena Neuschulz, Marco Aurelio Pizo, Marta Quitian, Roman A. Ruggera, Francisco Saavedra, Vinicio Santillan, Virginia Sanz D'Angelo, Matthias Schleuning, Luis Pascoal da Silva, Fernanda Ribeiro da Silva, Sergio Timoteo, Anna Traveset, Maximilian G. R. Vollstadt, Jason M. Tylianakis
Summary: Species interactions can be influenced by ecological boundaries, and plant-frugivore networks show greater dissimilarity across ecoregion and biome boundaries while maintaining structural consistency.
NATURE COMMUNICATIONS
(2022)
Article
Biology
Jorge Isla, Miguel Jacome-Flores, Juan M. Arroyo, Pedro Jordano
Summary: This study investigates the plant-frugivore interactions in the rapid population expansion of a Mediterranean juniper. The researchers found that these interactions are reconfigured to adapt to the expansion landscape template, and this reconfiguration accelerates plant colonization.
PROCEEDINGS OF THE ROYAL SOCIETY B-BIOLOGICAL SCIENCES
(2023)
Article
Multidisciplinary Sciences
Leandro G. Cosmo, Ana Paula A. Assis, Marcus A. M. de Aguiar, Mathias M. Pires, Alfredo Valido, Pedro Jordano, John N. Thompson, Jordi Bascompte, Paulo R. Guimaraes Jr
Summary: Ecological interactions are vital for maintaining biodiversity on Earth. This study investigates the impact of direct and indirect effects in mutualistic networks, showing that indirect effects play a major role in determining species fitness. Indirect effects prevent coevolving species from adapting to their mutualistic partners and other environmental pressures, resulting in decreased fitness. The topological effect of peripheral species experiencing more indirect effects and greater reduction in fitness compared to central species is evident. The study also highlights how honeybees as a central species in pollination networks increase indirect effects, thus reducing the fitness of other species.