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The predictability of qualitative food web dynamics in response to extinction and invasion

Food webs are extraordinarily complex, containing myriad direct interactions and indirect effects. Determining how this network of interactions and effects influences a food web’s qualitative dynamics is a challenging task, especially because data …

The influence of prey predictability on the foraging behavior and movement of intertidal predators

Fluctuations and spatial heterogeneity of habitat and resources is thought to underlie niche variation in animal populations, with intraspecific differences serving to produce or maintain population-, community-, or ecosystem-level patterns. …

State-structured species interactions and their consequences across levels of biological organization

A central challenge for ecology is to understand the dynamic nature of species interactions. A classic approach to community ecology assumes that individuals within a species are functionally identical and that consumer-resource dynamics can be …

Candidate causes, consequences, and estimation of individual diet specialization

Diet variation among individuals within populations is widespread. Often diet dierences among individuals are attributable to obvious differences among individuals such as age, sex, or morphology. However, growing evidence suggests that individual …

Contributions of parasites to energy flow through a stream food web

Parasites are increasingly recognized for their significant roles in shaping community structure and ecosystem dynamics. Due to their cryptic nature, however, they are often neglected in measurements of energy flow and biomass in ecosystems. Past …

Competitive mechanisms underlying the displacement of native crayfish by non-native crayfish

Invasive species are one of the greatest threats to biodiversity around the world. Although a seemingly harmless act, species introduction into a new ecosystem can have detrimental effects. Once introduced, invasive species may disrupt the existing …

Effects of predator introductions on population and community dynamics

There is increasing awareness that human activities are altering the ways that natural systems operate and that local shifts in species composition and abundance can lead to abrupt and irreversible global change. Therefore, understanding the …

Sensitive barnacles - A case study for collaborative sustainable fishery development

Current human – ocean relationships are dominated by unsustainable extraction of marine resources having both ecological and socio-economic consequences. Sustainable fishery management utilizing stakeholder collaboration must become a proactive …

Using stable isotopes to quantify species interaction strengths

Understanding ecological interaction strengths is one of the main objectives of ecology. Recently, two methods for estimating interaction strengths of predator- prey interactions in nature have been proposed: a field observation approach proposed by …

Complex networks in kelp forest ecosystems - Visualizing big data

Kelp forests serve as an integral abode for aquatic species. Kelp forests are one of the most productive terrestrial systems, providing its denizens the conditions necessary for growth. Wave action allows for the constant motion of the seaweed, …