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Wyckhuys KAG, Leatemia JA, Fanani MZ, Furlong MJ, Gu B, Hadi BAR, Hasinu JV, Melo MC, Noya SH, Rauf A, Taribuka J, Gc YD. Generalist Predators Shape Biotic Resistance along a Tropical Island Chain. PLANTS (BASEL, SWITZERLAND) 2023; 12:3304. [PMID: 37765468 PMCID: PMC10536499 DOI: 10.3390/plants12183304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 09/12/2023] [Accepted: 09/12/2023] [Indexed: 09/29/2023]
Abstract
Islands offer exclusive prisms for an experimental investigation of biodiversity x ecosystem function interplay. Given that species in upper trophic layers, e.g., arthropod predators, experience a comparative disadvantage on small, isolated islands, such settings can help to clarify how predation features within biotic resistance equations. Here, we use observational and manipulative studies on a chain of nine Indonesian islands to quantify predator-mediated biotic resistance against the cassava mealybug Phenacoccus manihoti (Homoptera: Pseudococcidae) and the fall armyworm Spodoptera frugiperda (Lepidoptera: Noctuidae). Across island settings, a diverse set of generalist lacewing, spider and ladybeetle predators aggregates on P. manihoti infested plants, attaining max. (field-level) abundance levels of 1.0, 8.0 and 3.2 individuals per plant, respectively. Though biotic resistance-as imperfectly defined by a predator/prey ratio index-exhibits no inter-island differences, P. manihoti population regulation is primarily provided through an introduced monophagous parasitoid. Meanwhile, resident predators, such as soil-dwelling ants, inflict apparent mortality rates up to 100% for various S. frugiperda life stages, which translates into a 13- to 800-fold lower S. frugiperda survivorship on small versus large islands. While biotic resistance against S. frugiperda is ubiquitous along the island chain, its magnitude differs between island contexts, seasons and ecological realms, i.e., plant canopy vs. soil surface. Hence, under our experimental context, generalist predators determine biotic resistance and exert important levels of mortality even in biodiversity-poor settings. Given the rapid pace of biodiversity loss and alien species accumulation globally, their active conservation in farmland settings (e.g., through pesticide phasedown) is pivotal to ensuring the overall resilience of production ecosystems.
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Affiliation(s)
- Kris A G Wyckhuys
- Chrysalis Consulting, Danang 50000, Vietnam
- Institute for Plant Protection, China Academy of Agricultural Sciences (CAAS), Beijing 100193, China
- School of the Environment, University of Queensland, Saint Lucia, QLD 4067, Australia
| | - Johanna Audrey Leatemia
- Department of Agrotechnology, Faculty of Agriculture, Universitas Pattimura, Ambon 97233, Indonesia
| | - Muhammad Zainal Fanani
- Department of Agrotechnology, Faculty of Agriculture, Universitas Djuanda, Jl. Tol Jagorawi No 1, Ciawi, Bogor 16720, West Java, Indonesia
- Department of Plant Protection, Faculty of Agriculture, Institut Pertanian Bogor, Jl. Kamper Kampus IPB Dramaga, Bogor 16680, West Java, Indonesia
| | - Michael J Furlong
- School of the Environment, University of Queensland, Saint Lucia, QLD 4067, Australia
| | - Baogen Gu
- Food and Agriculture Organization (FAO), 00153 Rome, Italy
| | | | - Jeffij Virgowat Hasinu
- Department of Agrotechnology, Faculty of Agriculture, Universitas Pattimura, Ambon 97233, Indonesia
| | - Maria C Melo
- School of the Environment, University of Queensland, Saint Lucia, QLD 4067, Australia
| | - Saartje Helena Noya
- Department of Agrotechnology, Faculty of Agriculture, Universitas Pattimura, Ambon 97233, Indonesia
| | - Aunu Rauf
- Department of Plant Protection, Faculty of Agriculture, Institut Pertanian Bogor, Jl. Kamper Kampus IPB Dramaga, Bogor 16680, West Java, Indonesia
| | - Johanna Taribuka
- Department of Agrotechnology, Faculty of Agriculture, Universitas Pattimura, Ambon 97233, Indonesia
| | - Yubak Dhoj Gc
- Food and Agriculture Organization (FAO), Bangkok 10200, Thailand
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Cárdenas-Mahecha LP, Vitule JRS, Padial AA. Prey selectivity of the invasive largemouth bass towards native and non-native prey: an experimental approach. NEOTROPICAL ICHTHYOLOGY 2022. [DOI: 10.1590/1982-0224-2021-0123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Abstract Non-native predators are known to cause ecological impacts through heightened consumption of resources and decimation of native species. One such species is Micropterus salmoides. Often introduced for sport fishing worldwide; it has been listed by International Union for Conservation of Nature and Natural Resources as one of the 100 of the world’s worst invasive species. Whilst impacts conferred towards native prey are well known, its relationship with other non-native species has received much less attention. Therefore, the aim of this study was to experimentally investigate the feeding preference of M. salmoides towards native prey (Geophagus iporangensis) compared to non-native prey (Oreochromis niloticus and Coptodon rendalli) using comparative consumption and the Manly-Chesson selectivity index. We found a higher consumption by M. salmoides towards the non-native prey and a tendency for this non-native preference to increase when prey availability increased. Our results are in line with the hypothesis that the invasion of the non-native predator can be facilitated by the high abundance and reproductive rate of the non-native prey. This is relevant considering the interaction of multiple invaders in an ecosystem, in particular environments modified by humans. Interspecific relationships are complex and their understanding is necessary for environmental management decision-making.
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Affiliation(s)
| | | | - Andre Andrian Padial
- Universidade Federal do Paraná, Brazil; Universidade Federal do Paraná, Brazil; Universidade Estadual de Maringá, Brazil
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Robinson TB, Martin N, Loureiro TG, Matikinca P, Robertson MP. Double trouble: the implications of climate change for biological invasions. NEOBIOTA 2020. [DOI: 10.3897/neobiota.62.55729] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The implications of climate change for biological invasions are multifaceted and vary along the invasion process. Changes in vectors and pathways are likely to manifest in changes in transport routes and destinations, together with altered transit times and traffic volume. Ultimately, changes in the nature of why, how, and where biota are transported and introduced will pose biosecurity challenges. These challenges will require increased human and institutional capacity, as well as proactive responses such as improved early detection, adaptation of present protocols and innovative legal instruments. Invasion success and spread are expected to be moderated by the physiological response of alien and native biota to environmental changes and the ensuing changes in biotic interactions. These in turn will likely affect management actions aimed at eradicating, containing, and mitigating invasions, necessitating an adaptive approach to management that is sensitive to potentially unanticipated outcomes.
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Ma KCK, Zardi GI, McQuaid CD, Nicastro KR. Historical and contemporary range expansion of an invasive mussel, Semimytlius algosus, in Angola and Namibia despite data scarcity in an infrequently surveyed region. PLoS One 2020; 15:e0239167. [PMID: 32915915 PMCID: PMC7485899 DOI: 10.1371/journal.pone.0239167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 08/31/2020] [Indexed: 11/18/2022] Open
Abstract
Understanding the spread of invasive species in many regions is difficult because surveys are rare. Here, historical records of the invasive marine mussel, Semimytilus algosus, on the shores of Angola and Namibia are synthesised to re-construct its invasive history. Since this mussel was first discovered in Namibia about 90 years ago, it has spread throughout the western coast of southern Africa. By the late 1960s, the species was well established across a range of 1005 km of coastline in southern Angola and northern Namibia. Although only coarse spatial resolution data are available since the 1990s, the distribution of S. algosus clearly increased substantially over the subsequent decades. Today, the species is distributed over 2785 km of coastline, appearing in southern Namibia in 2014, whence it spread across the border to northern South Africa in 2017, and in northern Angola in 2015. Conspicuously, its current range appears to be relatively contiguous across at least 810 km of shore in southern Angola and throughout Namibia, with isolated, spatially disjunct occurrences towards the southern and northern limits of its distribution. Despite there being few occurrence records that are unevenly distributed spatially and temporally, data for the distributional patterns of S. algosus in Angola and Namibia provide invaluable insights into how marine invasive species spread in developing regions that are infrequently monitored.
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Affiliation(s)
- Kevin C. K. Ma
- Department of Zoology and Entomology, Rhodes University, Grahamstown, Eastern Cape, South Africa
- * E-mail:
| | - Gerardo I. Zardi
- Department of Zoology and Entomology, Rhodes University, Grahamstown, Eastern Cape, South Africa
| | - Christopher D. McQuaid
- Department of Zoology and Entomology, Rhodes University, Grahamstown, Eastern Cape, South Africa
| | - Katy R. Nicastro
- Department of Zoology and Entomology, Rhodes University, Grahamstown, Eastern Cape, South Africa
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