Recent Fish Introductions Into Everglades National Park: An Unforeseen Consequence of Water Management?

Kline, Jeffrey L.; Loftus, William F.; Kotun, Kevin; Trexler, Joel C.; Rehage, Jennifer S.; Lorenz, Jerome J.; Robinson, Michelle

doi:10.1007/s13157-012-0362-0

Cited by 46 publications

(57 citation statements)

References 31 publications

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“…This combination of attributes separates T. vittata from the other non-native fishes that are either: 1) large-bodied species that consume benthic algae and detritus (e.g., Pterygoplichthys spp., O. aureus) or 2) largeto medium-sized fish predators (cichlids, C. batrachus). One species that does not fit this pattern is H. letourneuxi, which consumes both invertebrates and fish and does not reach a large body size (Table 2), yet is extremely invasive (Kline et al 2013; Fig. 1).…”

Section: Discussionmentioning

confidence: 99%

Small but tough: What can ecophysiology of croaking gourami Trichopsis vittata (Cuvier, 1831) tell us about invasiveness of non-native fishes in Florida?

Schofield¹,

Schulte²

2016

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Trichopsis vittata (Cuvier, 1831) is a small, freshwater gourami (Fam: Osphronemidae) native to southeast Asia. It was first detected in Florida in the 1970s and seems to have persisted for decades in a small area. In this study, we documented T. vittata's ecophysiological tolerances (salinity and low-temperature) and qualitatively compared them to published values for other sympatric non-native species that have successfully invaded much of the Florida peninsula. Trichopsis vittata survived acute salinity shifts to 16 psu and was able to survive up to 20 psu when salinity was raised more slowly (5 psu per week). In a cold-tolerance experiment, temperature was lowered from 24 °C at 1 °C hr -1 until fish died. Mean temperature at death (i.e., lower lethal limit) was 7.2 °C. Trichopsis vittata seems as tolerant or more tolerant than many other sympatric non-native fishes for the variables we examined. However, T. vittata is the only species that has not dispersed since its introduction. Species other than T. vittata have broadly invaded ranges, many of which include the entire lower third of the Florida peninsula. It is possible that tolerance to environmental parameters serves as a filter for establishment, wherein candidate species must possess the ability to survive abiotic extremes as a first step. However, a species' ability to expand its geographic range may ultimately rely on a secondary set of criteria including biotic interactions and life-history variables.

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Section: Discussionmentioning

confidence: 99%

Small but tough: What can ecophysiology of croaking gourami Trichopsis vittata (Cuvier, 1831) tell us about invasiveness of non-native fishes in Florida?

Schofield¹,

Schulte²

2016

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“…The African jewelfish is of increasing interest in fish sampling and environmental DNA monitoring by management agencies (Kline et al 2013. Its recent spread in south, southwest, and west-central Florida (Langston et al 2010), including expansion into environmentally sensitive protected areas (Kline et al 2013), is of management concern because of potential impacts on native invertebrates and small-bodied fishes by this aggressive predator , Schofield et al 2014.…”

Section: Study Speciesmentioning

confidence: 99%

Collapse of a reproducing population of non-native African jewelfish (Hemichromis letourneuxi) in a Florida lake

Hill¹

2016

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Established populations of non-natives may collapse without a clear causal mechanism. Hypothetically, fluctuations in habitat structural complexity may influence dynamics of invaders and the biotic resistance offered by predators. Herein I report observations of the collapse of a reproducing population of the nonnative African jewelfish (Hemichromis letourneuxi) in a Florida lake concurrent with an unusual low-water period. I test the hypothesis that predation may have played a key role in the collapse using a combination of field surveys of habitat and fish abundance and predator-prey experiments. Habitat complexity was high before and after the low water period but virtually nonexistent during low water. The abundance of African jewelfish and native juvenile bluegill (Lepomis macrochirus) and eastern mosquitofish (Gambusia holbrooki) declined concurrently with decreasing complexity but the native species rebounded when lake levels increased. Large-bodied natives such as largemouth bass (Micropterus salmoides) and adult bluegill showed no pattern of fluctuation related to habitat complexity. African jewelfish survival was 1.6 times greater at high versus low complexity and over 7 times higher versus no complexity in the presence of largemouth bass. Conversely, eastern mosquitofish, a species that exerts strong effects on small-bodied fishes in structurally complex habitats had no effect on African jewelfish survival. Predation effects on susceptible non-natives should be considered as a potential control action. Population collapse is understudied but may provide insights into long-term dynamics of invaders and information useful for management of problematic species.

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“…In an area that contains abundant solution holes known as the 'rocky glades' region ( Fig. 1), Kline et al (2014) also showed a high abundance of non-native fishes. Using long-term fish community datasets they demonstrated how water management projects have increased connectivity between the marsh and canal water sources, which was concomitant with increased invasive-exotic species.…”

Section: Distribution Of Aquatic Consumersmentioning

confidence: 99%

“…Still, meeting the challenge of restoring the ecosystem through improvements in water quantity, timing, and distribution while maintaining quality in an ecosystem where above and below-ground water movement is largely and naturally diffuse remains challenging. However, because long-term trajectories of populations and communities suggest little resilience to rapid colonization by non-native and opportunistic species at the expense of assemblages distinct to the Everglades Kline et al 2014;Lorenz 2014a, b;Rehage et al 2014;Sokol et al 2014), pressure for rapid implementation of effective solutions grows. Given suggestions that the ecosystem retains resilience and capacity for recovery (Childers et al 2003;Ross et al 2014), restoration success is still possible if connectivity-informed strategies are implemented in a timely manner.…”

Section: Coastal Boundary and Restoration Challengesmentioning

confidence: 99%

Wetland Ecosystem Response to Hydrologic Restoration and Management: The Everglades and its Urban-Agricultural Boundary (FL, USA)

et al. 2014

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Wetland restoration success depends on understanding ecohydrological complexities in addition to the historical extent and legacies of past modifications. Restoration effectiveness in the Florida Everglades has been studied for several decades. We focused this special issue on the effects of hydrologic restoration in the southeastern Everglades, as this region provides a model for understanding wetland and estuarine response to management and restoration along an urban-agricultural-wetland boundary. We synthesize several decades of interdisciplinary wetland ecosystem restoration studies examining the influence of hydrologic and biogeochemical changes on spatial and temporal patterns of ecosystem structure and function. Our goal is to improve restoration effectiveness by revealing connections between water management activities and ecosystem changes. Synthesis of these long-term data suggests restoration success is contingent on quantifying the influences hydrologic restoration on landscape connectivity within and outside of the Everglades boundaries, in addition to its interactions with organisms and their complex food webs. Rehabilitating habitat structure and connectivity in the southeastern Everglades can be accomplished through increasing delivery of clean freshwater to its primary flow-way, Taylor Slough. This compendium indicates that reversal of water quality impacts of rehydration is possible given timely and informed approaches that improve the flow clean freshwater to the Everglades.

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Recent Fish Introductions Into Everglades National Park: An Unforeseen Consequence of Water Management?

Cited by 46 publications

References 31 publications

Small but tough: What can ecophysiology of croaking gourami Trichopsis vittata (Cuvier, 1831) tell us about invasiveness of non-native fishes in Florida?

Small but tough: What can ecophysiology of croaking gourami Trichopsis vittata (Cuvier, 1831) tell us about invasiveness of non-native fishes in Florida?

Collapse of a reproducing population of non-native African jewelfish (Hemichromis letourneuxi) in a Florida lake

Wetland Ecosystem Response to Hydrologic Restoration and Management: The Everglades and its Urban-Agricultural Boundary (FL, USA)

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