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Andreone, Franco; Randrianirina, Jasmin E.; Jenkins, Paula; Aprea, Gennaro

doi:10.1023/a:1026559728808

Cited by 32 publications

(3 citation statements)

References 11 publications

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“…The contribution of western and northern forest ecosystems to the conservation of endemic and threatened Malagasy taxa has been previously demonstrated for several species of reptiles (Raxworthy and Nussbaum 1995, Andreone et al 2000, amphibians (Andreone et al 2000), small mammals (Soarimalala and Goodman 2003) and birds (Seddon and Tobias 2007 deforestation, but might also help to overcome the frequent bias in protected area designation in Madagascar, which tends to ignore aquatic diversity . However, as protected area creation is a mid-or long -term process (taking at least 3 -4 years to obtain definitive protection status), the monitoring of key environmental resources should start early to ensure long -term viability of these proposed sites.…”

Section: Introductionmentioning

confidence: 95%

Protected area surface extension in Madagascar: Do endemism and threatened species remain useful criteria for site selection ?

Rabearivony¹,

Thorstrom²,

Roland³

et al. 2010

MCD

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Section: Introductionmentioning

confidence: 95%

Protected area surface extension in Madagascar: Do endemism and threatened species remain useful criteria for site selection ?

Rabearivony¹,

Thorstrom²,

Roland³

et al. 2010

MCD

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“…The few available studies on the response of amphibian communities to land-use change in Madagascar reported lower overall values, with 32 and 28 species, respectively(Vallan 2000;Ndriantsoa et al 2017). Andreone et al (2000) found 42 amphibian and 23 reptile species between the Anjanaharibe-Sud and Marojejy massifs in a north-eastern Malagasy rainforest. Despite differences in methodology and study sites, our study provided additional evidence that the north-eastern of Madagascar is one of the most species-rich regions for herpetofauna, as previously suggested(Brown et al 2016).…”

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confidence: 99%

Differential responses of amphibians and reptiles to land-use change in the biodiversity hotspot of north-eastern Madagascar

Fulgence

Martin

Randriamanantena

et al. 2021

Preprint

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Large expanses of tropical rainforest have been converted into agricultural landscapes cultivated by smallholder farmers. This is also the case in north-eastern Madagascar; a region that retains a significant proportions of forest cover despite shifting hill rice cultivation and vanilla agroforestry. The region is also a global hotspot for herpetofauna diversity, but how this diversity is affected by land-use change remains largely unknown. Using a space-for-time study design to uncover land-use effects, we compared species diversity and community composition in seven prevalent land uses: unburned (old-growth forest, forest fragment, and forest-derived vanilla agroforest) and burned (fallow-derived vanilla agroforest, woody fallow, herbaceous fallow) land-use types, and rice paddy. We conducted six comprehensives, time-standardized searches across at least ten replicates of each land-use type and applied genetic barcoding to confirm species identification. We documented an outstanding diversity of endemic herpetofauna (119 species): amphibian species richness at the plot level was highest in old-growth forest and significantly lower in all other land-use types. Plot-level reptile species richness was significantly higher in the unburned land-use types than burned land-use types. For both amphibians and reptiles, the less-disturbed land-use types showed more uneven communities and particularly in old-growth forest, the species composition differed significantly from all other land-use types. Amphibians showed a higher level of forest dependency compared to reptiles (38% versus 28% of species exclusively occurred in old-growth forest). Our analyses thus revealed that the two groups respond differently to land-use change: we found less pronounced losses of reptile species richness especially in unburned agricultural habitats, suggesting that reptiles are less susceptible to land-use change than amphibians. Overall, old-growth forest harboured a unique diversity, but some species also thrived in agroforestry systems, especially if these were forest-derived. This highlights the importance of conserving old-growth forests and non-burned land-use types within the agricultural landscape.

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“…On the plot level, we found up to 12 amphibian and 13 reptile species within a 25 m radius, summing up to 119 species overall (58 amphibian and 51 reptile species). Other studies investigating the response of amphibian communities to land-use change in Madagascar (Ndriantsoa et al, 2017;Vallan, 2000) found lower overall values, with 62 and 28 species, respectively; and Andreone et al (2000) found 42 amphibian and 23 reptile species in a rainforest in north-eastern Madagascar. The only study coming close to the diversity documented here is also from northeastern Madagascar, obtaining records for 80 amphibian 52 reptile species (Rabearivony et al, 2015) in a forest corridor.…”

Section: Outstanding Diversity Of Amphibians and Reptiles In Madagasc...mentioning

confidence: 94%

Smallholder vanilla agroforestry in Madagascar: biodiversity, ecosystem services and yields in a land-use context

A.¹

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Land-use change threatens biodiversity and ecosystem services worldwide. Tropical areas are currently particularly affected: natural ecosystems are being transformed into largescale monocultures or small-scale mosaic landscapes characterized by smallholder agriculture. In both cases, the conversion of natural ecosystems into agriculturally used areas can greatly increase yield, at least in the short term.A rapid change in land use is currently taking place in north-eastern Madagascar, driven by two main factors: the cultivation of rice through shifting cultivation and the conversion of forests and fallow land into vanilla agroforestry. The result of these processes is a smallscale and very heterogeneous agricultural landscape. This dissertation shows what this land-use change means for biodiversity and ecosystem services, how realized harvests and profitability influence land use decisions, and where there are opportunities for nature conservation through targeted policy interventions in north-eastern Madagascar. Importantly, this is a greatly under-researched topic, given that research on the conservation value of converted lands in Madagascar is still in its infancy. Indeed, nearly nothing has been published on biodiversity, ecosystem services, and yields in vanilla agroforests.To compare different forms of land use, we selected 80 plots in 10 villages and in Marojejy National Park where we collected a large part of the biodiversity and ecosystem service data that underpins this dissertation. The seven land-use types were old-growth forest, forest fragment, forest-derived vanilla agroforestry, fallow-derived vanilla agroforestry, herbaceous fallow, woody fallow, and rice paddy. To obtain more precise data on tree dynamics and harvests in vanilla agroforests, we additionally researched a chronosequence with 209 vanilla agroforests. Furthermore, this thesis also contains a review on the importance of 1.1 Land-use change as a key diver of biodiversity loss ……………………………………………..15 Box 1: My PhD journey -Interdisciplinarity and diversity……………………………………..… 18 1.2 Trade-offs between biodiversity, ecosystem services, and yields in tropical smallholder agriculture, with a focus on agroforests …………………………………………………19 Box 2: My PhD journey -Transdisciplinarity ………………………………………..………………… 22 1.3 Natural history, land-use change, and conservation in Madagascar ………………………23

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Cited by 32 publications

References 11 publications

Protected area surface extension in Madagascar: Do endemism and threatened species remain useful criteria for site selection ?

Protected area surface extension in Madagascar: Do endemism and threatened species remain useful criteria for site selection ?

Differential responses of amphibians and reptiles to land-use change in the biodiversity hotspot of north-eastern Madagascar

Smallholder vanilla agroforestry in Madagascar: biodiversity, ecosystem services and yields in a land-use context

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