Ivette Perfecto

Ivette Perfecto
University of Michigan | U-M · School of Natural Resources and Environment

PhD

About

268
Publications
81,284
Reads
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17,099
Citations
Citations since 2016
94 Research Items
8567 Citations
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201620172018201920202021202202004006008001,0001,2001,400
201620172018201920202021202202004006008001,0001,2001,400

Publications

Publications (268)
Article
Full-text available
Most species are embedded in multi-interaction networks. Consequently, theories focusing on simple pair-wise interactions cannot predict ecological and/or evolutionary outcomes. This study explores how cascading higher-order interactions (HOIs) would affect the population dynamics of a focal species. Employing a system that involves a myrmecophylic...
Article
The ant communities on coffee farms in the West/Central Mountains of Puerto Rico are composed of mainly invasive species, although many have a long history of occupation and are effectively naturalized. The ecological forces that maintain such communities are thus of interest, and are evidently related to the spatial patterns in which they inevitab...
Article
Full-text available
Concerns over the capacity of the world’s existing agricultural land to provide food for the global population under climate change and continued biodiversity loss have set the stage for a prevailing narrative of inherent tradeoffs with agricultural production. Coffee, a major export of tropical countries, offers a unique opportunity to examine how...
Article
Full-text available
Environmental impacts of conventional agriculture have generated interest in sustainable agriculture. Biological pest control is a fundamental tool, and ants are key players providing ecological services, as well as some disservices. We have used a meta-analytical approach to investigate the contribution of ants to biological control, considering t...
Preprint
Most species are embedded in multi-interaction networks. Consequently, theories focusing on simple pair-wise interactions cannot predict ecological and/or evolutionary outcomes. This study explores how cascading higher-order interactions (HOIs) would affect the population dynamics of a focal species. Employing a system that involves a myrmecophylic...
Article
Full-text available
While integrating trees into agricultural systems (i.e., agroforestry systems) provides many valuable ecosystem services, they can also interact with plant diseases. We demonstrate that a detailed understanding of how plant diseases interact with trees in agroforestry systems is necessary to identify key tree canopy characteristics, leaf traits, sp...
Article
Full-text available
Natural pest control is an alternative to pesticide use in agriculture, which may help to curb insect declines and promote crop production. Nonconsumptive interactions in natural pest control, which historically have received far less attention than consumptive interactions, may have distinct impacts on pest damage suppression and may also mediate...
Article
Full-text available
Critical transitions, sudden responses to slow changes in environmental drivers, are inherent in many dynamic processes, prompting a search for early warning signals. We apply this framework to understanding the coffee rust disease, which experienced an unprecedented outbreak in Mesoamerica in 2012–2013, likely a critical transition. Based on month...
Article
Full-text available
Neotropical shade-grown coffee systems are renowned for their potential to conserve avian biodiversity. Yet, little is known about food resources consumed by insectivorous birds in these systems, the extent of resource competition between resident and migratory birds, or how management of shade trees might influence diet selection. We identified ar...
Article
The capacity of highly diverse systems to prevail has proven difficult to explain. In addition to methodological issues, the inherent complexity of ecosystems and issues like multicausality, non-linearity and context-specificity make it hard to establish general and unidirectional explanations. Nevertheless, in recent years, high order interactions...
Article
Several beetle species in the family Coccinellidae have evolved close associations with ants in order to consume ant-tended hemipteran prey. These myrmecophilous lady beetles employ various strategies for avoiding ant aggression, including physical and chemical protection. We asked how the lady beetle Diomus lupusapudoves Vandenberg, Iverson and Li...
Article
Conservation biological control consists of managing agroecosystem to maintain and enhance the action of natural enemies. Agroforestry systems such as shaded coffee system has been shown to maintain high diversity of organisms, including predators and parasitoids of insect pest. The coffee berry borer (CBB), Hypothenemus hampei, is one of the most...
Book
Full-text available
La Agroecología y las Ciencias de la Complejidad surgieron en la segunda mitad del siglo XX. En tanto campos académicos en construcción y de frontera, ambas enfrentan los retos de continuar reflexionando sobre sus bases epistémicas, explorar enfoques metodológicos novedosos y robustecer sus corpus a través de casos de estudio de distinta naturaleza...
Article
Insights on impacts and resiliency of avian species with respect to hurricanes in the Caribbean have largely focused on responses measured in protected habitats. We assessed avian responses in non-protected habitat, specifically shade-restored coffee plantations, because their structural complexity retains many attributes of secondary forests, and...
Article
Full-text available
Volant vertebrate insectivores, including birds and bats, can be important regulators of herbivores in forests and agro-ecosystems. Their effects can be realized directly through predation and indirectly via intraguild predation. This paper examines data from bird and bat exclosures in coffee farms in Chiapas, Mexico in order to determine their eff...
Article
Full-text available
Ecological systems, as is often noted, are complex. Equally notable is the generalization that complex systems tend to be oscillatory, whether Huygens' simple patterns of pendulum entrainment or the twisted chaotic orbits of Lorenz’ convection rolls. The analytics of oscillators may thus provide insight into the structure of ecological systems. One...
Preprint
Full-text available
The capacity of highly diverse systems to prevail has proven difficult to explain. In addition to methodological issues, the inherent complexity of ecosystems and issues like multicausality, non-linearity and context-specificity make it hard to establish general and unidirectional explanations. Nevertheless, in recent years, high order interactions...
Article
Complexity and contingency frame much of current thinking in population and community ecology. The coffee pest, Leucoptera coffeella, is particularly problematical in Puerto Rico, but is usually held under control in Mexico. A variety of arboreal ants are effective predators in Mexico, but are limited in an indirect fashion by the common aggressive...
Article
Full-text available
Agricultural ecosystems are by their very nature novel and by definition the more general biodiversity associated with them must likewise constitute a novel community. Here, we examine the community of arboreally foraging ants in the coffee agroecosystem of Puerto Rico. We surveyed 20 coffee plants in 25 farms three times in a period of one year. W...
Article
Endogenous (or autonomous, or emergent) spatial pattern formation is a subject transcending a variety of sciences. In ecology, there is growing interest in how spatial patterns can ‘emerge’ from internal system processes and simultaneously affect those very processes. A classic situation emerges when a predator's focus on a dominant competitor rele...
Book
The Michigan Big Woods research plot is a 23-ha forest dynamics research area at the Edwin S. George Reserve in Pinckney, MI, USA and is part of the Smithsonian Institution’s ForestGEO network of research stations. The plot’s freestanding woody vegetation (trees and shrubs) were censused three times, in 2003, 2008–2010, and 2014; lianas were census...
Preprint
Full-text available
Ecological systems, as is often noted, are complex. Equally notable is the generalization that complex systems tend to be oscillatory, whether Huygens simple patterns of pendulum entrainment or the twisted chaotic orbits of Lorenz convection rolls. The analytics of oscillators may thus provide insight into the structure of ecological systems. One o...
Article
The coffee berry borer, Hypothenemus hampei (Ferrari), has at least two generalist predators that are well-known for their biological control potential, the little fire ant, Wasmannia auropunctata and various species of lizards in the genus Anolis. While it is frequently suggested that multiple control elements make biological control more efficaci...
Article
Full-text available
Agroecosystems are almost always by definition composed of novel assemblages of organisms from various parts of the world (Perfecto and Vandermeer 2015). As ecologists, we have little ability to predict a priori how interactions within these novel assemblages will organize themselves and what their impacts will be within and adjacent to agricultura...
Article
Full-text available
Whether an ecological community is controlled from above or below remains a popular framework that continues generating interesting research questions and takes on especially important meaning in agroecosystems. We describe the regulation from above of three coffee herbivores, a leaf herbivore (the green coffee scale, Coccus viridis), a seed predat...
Article
Full-text available
Many indigenous communities across Latin America depend on forests for livelihood. In eastern Bolivia, indigenous communities face increasing challenges in forest management due to insecure land tenure, lack of capacity, and state policies that favor extractivism and export-oriented agriculture. This case study examines the dilemma of forest manage...
Article
Full-text available
Resistance and resilience have become important concepts in the evaluation of disturbance events, providing a framework that is useful in light of the expected increase in frequency and occurrences of hurricanes as a consequence of climate change. Hurricane Maria landed on Puerto Rico as a category 4 storm in September of 2017. Among the affected e...
Poster
Full-text available
Background/Question/Methods As interest in biodiversity within working landscapes has increased, and greater focus has been given to conservation outside of protected areas, there is a corresponding need to evaluate the capacity of different land uses to meet conservation needs. Coffee agriculture has garnered interest as a land use with high conse...
Article
Seeking to employ ecological principles in agricultural management, a classical ecological debate provides a useful framing. Whether ecosystems are controlled from above (predators are the limiting force over herbivores) or from below (overutilization of plant resources is the limiting force over herbivores) is a debate that has motivated much rese...
Article
Coffee was introduced to Mexico in the late eighteenth century, but it was not until the late nineteenth century that wealthy European immigrants purchased “unregistered” land and invested in coffee cultivation. Displaced farmers, mostly indigenous, returned to the region as plantation workers and learned how to cultivate coffee. After the Mexican...
Article
Globally, industrial agriculture threatens critical ecosystem processes on which crop production depends, while 815 million people are undernourished and many more suffer from malnutrition. The second Sustainable Development Goal (SDG 2), Zero Hunger, seeks to simultaneously address global environmental sustainability and food security challenges....
Article
Full-text available
This paper examines the relationship between agroecological scaling and the agrarian question, based on Puerto Rico’s contradictory agricultural and demographic tendencies in the aftermath of Hurricanes Irma and Maria. We find that labor-based intensification, literally rebuilding and recovering the diversity of farms devastated by the hurricanes,...
Article
Full-text available
Wild bees are indispensable pollinators, supporting global agricultural yield and angiosperm biodiversity. They are experiencing widespread declines, resulting from multiple interacting factors. The effects of urbanization, a major driver of ecological change, on bee populations are not well understood. Studies examining the aggregate response of w...
Chapter
Full-text available
Introducción La participación y visibilización de las mujeres es indispensable para el avance y escalamiento de la agroecología (Mier y Terán et al. 2018). En este capítulo se abordan la situación y el posicionamiento de las agroecólogas en los ámbitos académicos y científicos, así como algunas contribuciones a partir de la experiencia de la Alianz...
Article
Forests in eastern North America are undergoing rapid compositional changes as they experience novel climate, disturbance, and pest conditions. One striking pattern is the replacement of canopy oaks (Quercus spp.) by mesic, fire-sensitive, shade-tolerant species like red maple (Acer rubrum L.). To gain insight into the successional patterns driving...
Poster
Full-text available
Background/Question/Methods: Amphibians are experiencing global population declines at a rate substantially higher than that of most other taxa. Because habitat loss and land conversion are primary drivers of this decline, identifying mechanisms that promote species diversity and abundance in agricultural landscapes is a critical component of speci...
Article
Full-text available
The current global food system is inadequate to meet the needs of the current world population without compromising future well-being. For example, current intensified production systems lead to undernutrition in some regions coupled with epidemics of obesity in others while compromising their underlying ecological foundations, such as creating are...
Article
Natural enemy diversity may be beneficial, through species complementarity, or detrimental, through antagonistic interactions, such as competition or intraguild predation, for the biological control of agricultural pests. We studied two coexisting myrmecophilous coccinellid beetles, Azya orbigera (Mulsant) (Coleoptera: Coccinellidae) and an undescr...
Preprint
Full-text available
A major goal of invasion biology is to understand under what conditions exotic species thrive in the introduced range. High competitive abilities are thought to be an important characteristic of exotic species. Most invasion studies focus on the competitive ability of exotic species in the introduced range and attribute their ecological success to...
Article
Full-text available
Ants are important biological control agents of the coffee berry borer (CBB), Hypothenemus hampei (Ferrari, 1867), the most damaging insect pest of coffee around the world. Ants also occur naturally in coffee landscapes, opening the door to conservation biocontrol approaches, which can promote both biodiversity conservation and crop production. Her...
Article
Full-text available
Dynamic modeling of plant pathogens has usually been accomplished with either a mean field or spatially explicit approach, searching generally for either broad generalization or precise prediction. In search of a qualitative intermediate that is able to query spatial particulars of transmission, we take an approximate approach using network theory....