Do Hydrologic Regimes Used in Rice Fields Compromise the Viability of Resting Stages of Aquatic Invertebrates?

Stenert, Cristina; Bacca, Roberta C.; Ávila, Arthur Cardoso de; Maltchik, Leonardo; Rocha, Odete

doi:10.1007/s13157-010-0083-1

Cited by 20 publications

(25 citation statements)

References 29 publications

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“…In some warmer regions, two or three crops a year are produced (Van Arsdale and Lewis, 1995), while in cooler areas a yield of one crop a year results in a longer fallow period of up to eight months. Brazilian rice fields typically have a fallow stage lasting two years to restore soil fertility, increase soil organic content and suppress weeds (Stenert et al, 2010).…”

Section: The Rice Field Habitatmentioning

confidence: 99%

“…Ostracods are ideally suited to exploit rice fields, which is why they are often the dominant group in the rice field environment (Roger, 1996). Many rice field ostracods have desiccation-resistant eggs (Horne and Martens, 1998;Stenert et al, 2010), their carapaces help to retain moisture during periods of drought and protect them from UV radiation (Van den Broecke et al, 2012), they have a short life cycle, and they consume organic detritus, algae and cyanobacteria, all prolific in rice fields.…”

Section: The Rice Field Habitatmentioning

confidence: 99%

“…3), which can survive the fallow, dry periods of rice cultivation (at least for two years), hatching soon after the rice fields are flooded (Stenert et al, 2010). Heterocypris incongruens, a very common inhabitant of rice fields, produces two types of eggs, one of which rapidly develops, and the other which remains dormant (85% of the total) (Angell and Hancock, 1989).…”

Section: Survival Strategies In Rice Fieldsmentioning

confidence: 99%

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A review of rice field ostracods (Crustacea) with a checklist of species

et al. 2017

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Ostracods are very common in rice fields and they can have a significant influence on the rice field ecosystem. They can reach very high densities, often higher than other meiofauna, and their activities can have both positive and negative effects on rice harvests. They directly affect nutrient recycling through excretion, and indirectly by physically disturbing the soil and releasing minerals, thus improving rice growth. On the other hand, ostracods grazing on nitrogen-fixing cyanobacteria potentially reduce rice yields. Rice is a primary staple food for over half of the world's population, and therefore ostracods can have a significant impact on human food supply. The origin of the rice field ostracod fauna is poorly known, but many rice field ostracods are considered invasive, especially in southern Europe, and from rice fields they have the potential to spread to surrounding natural habitats. Despite their invasive potential and ecological effects on the rice field ecosystem, very little is known about the diversity, ecology and impacts of rice field ostracods in many rice-producing countries. One hundred and ninety-two named ostracod species/subspecies have been reported from rice fields in 26 countries and states worldwide in the published literature; for over three-quarters of riceproducing countries, no data are readily available, and for most of the countries that have available data, diversity is clearly underreported. Most species that have been documented from rice fields belong to the Cyprididae (78%), a family that makes up approximately 43% of the 2500+ non-marine ostracod species. A further six families (Candonidae, Darwinulidae, Entocytheridae, Ilyocyprididae, Limnocytheridae and Notodromadidae) form the remainder of rice field ostracods. Twenty-two percent of the species reported from rice fields are sexually reproducing, 18% have mixed reproduction, but are mostly asexual, and for 60% males are unknown, and are probably entirely asexually reproducing species. This review and checklist of rice field ostracods are presented to facilitate further research on this group in rice field habitats, research that is crucial for food security in many regions

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Section: The Rice Field Habitatmentioning

confidence: 99%

Section: The Rice Field Habitatmentioning

confidence: 99%

Section: Survival Strategies In Rice Fieldsmentioning

confidence: 99%

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A review of rice field ostracods (Crustacea) with a checklist of species

et al. 2017

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“…Rice fields are considered man made habitats for many species of aquatic plants, invertebrates, amphibians and birds throughout the world, especially during the rice growth period (Czech and Parsons 2002;Bambaradeniya and Amerasinghe 2004;Elphick and Oring 2003). Some studies in southern Brazil have also shown that most of the regional aquatic biota utilizes these ecosystems as temporary habitats Rolon and Maltchik 2010;Stenert et al 2010;Maltchik et al 2011;Guadagnin et al 2012;Linke et al 2014;Moreira and Maltchik 2014). The presence of these organisms in these ecosystems has attracted the attention of researchers involved with species conservation, especially in the attempt to discover which rice cultivation practices have the lowest impact on species diversity in the agricultural matrix.…”

Section: Introductionmentioning

confidence: 99%

“…When rice field managers in California flooded their fields after harvest to accelerate straw decomposition, more habitat was created for aquatic birds (Elphick and Oring 2003). Studies have shown that rice plots that maintained water during the offseason period had different compositions of macrophytes, invertebrates and amphibians than plots that were drained for livestock Rolon and Maltchik 2010;Stenert et al 2009Stenert et al , 2010.These researchers emphasize that maintaining water in some fields during the off-season period could be a strategy for promoting greater biodiversity in the agricultural matrix .…”

Section: Introductionmentioning

confidence: 99%

Does intensification of the rice cultivation cycle influence anuran diversity in rice fields?

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Stenert

Rolon

et al. 2015

Wetlands Ecol Manage

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The reduction in the amount of fallow time in rice production has occurred in the last years to increase the grain production and to sustain the global market. Some studies have shown environmental problems with reduced fallow time and it could influence negatively the pond anuran diversity. The present study tested three hypotheses: (1) amphibian richness and abundance will be greater in natural areas than rice fields; (2) rice fields with a fallow period will have greater amphibian richness and abundance than fields without this period; and (3) changes in the species composition between natural ponds and rice fields with and without a fallow period will be determined by community nestedness over the agricultural intensification gradient-natural ponds (no impact), fields with fallow period (medium impact) and fields without fallow period (greatest impact). Anurans were sampled from six rice fields cultivated under different levels of agricultural intensification (three fields with and three fields without a fallow season), and three natural ponds in southern Brazil. Although richness did not vary significantly between fields with and without fallow periods, there was a strong tendency in the results for the anuran community in the fields with fallow to be richer than that in the fields without fallow. Additionally, it is important to emphasize that the species composition of the fields with fallow were richer than the species composition of fields without fallow. Therefore, allowing the land to rest could be an important practice for the amphibian community, and rice farmers should manage some parcels of land in the agricultural matrix with resting practices in order to minimize the negative effects of rice production expansion on aquatic biodiversity in natural wetlands.

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Species' traits and taxonomic distance can predict the hatching phenology of ostracod (Crustacea) resting eggs from tropical floodplain lakes

et al. 2021

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Freshwater ostracods are commonly found in temporary ponds and lakes, surviving drought periods by producing resting eggs. We investigated the hatching phenology of ostracod resting eggs from the sediments of temporary floodplain lakes, considering both the taxonomic distance between species and their functional traits, such as carapace size (length and height) and shape, valve ornamentation, and reproductive mode. In addition, we tested the hypotheses: (1) that the hatching time is more similar between congeneric ostracod species than between noncongeneric species; (2) that differences in hatching time between congeneric species are often related to differences in functional traits; (3) that both species composition and functional traits composition of hatchlings change over the incubation time, but with a reduction in the variability over time. The experiment was conducted for 98 days in the laboratory, and the microcosms were monitored weekly. The first hatching of an ostracod was recorded during the second week of incubation after hydration of the sediments. A total of 12 ostracod species hatched, belonging to the families Cyprididae and Candonidae. The above three hypotheses were corroborated. The time between inundation and first hatching was mostly similar for congeneric species in the genus Chlamydotheca, but was different between some species of Strandesia, which might be owing to differences in functional traits. The species composition and functional trait composition of the hatched ostracods were significantly different over the 14 weeks of incubation due to the different hatching phenology of different species. Furthermore, our results show that both taxonomic distance and functional traits can influence the hatching time of ostracod resting eggs from temporary floodplain lakes. Thus, future studies addressing the hatching phenology of ostracod resting eggs (and resting stages from other invertebrates) should also emphasize the use of functional traits.

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Do Hydrologic Regimes Used in Rice Fields Compromise the Viability of Resting Stages of Aquatic Invertebrates?

Cited by 20 publications

References 29 publications

A review of rice field ostracods (Crustacea) with a checklist of species

A review of rice field ostracods (Crustacea) with a checklist of species

Does intensification of the rice cultivation cycle influence anuran diversity in rice fields?

Species' traits and taxonomic distance can predict the hatching phenology of ostracod (Crustacea) resting eggs from tropical floodplain lakes

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