Escasa presencia y grave amenaza para el “cortarramas peruano”, Phytotoma raimondii

Romo, Mónica; Rosina, Mario; Flanagan, Jeremy N. M.; Pollack, Luis; Franke, Irma

doi:10.15381/rpb.v22i2.11355

Cited by 5 publications

(14 citation statements)

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“…The response surface of C. crotonoides of Peruvian plantcutter was unexpected; however, our field experience suggests that the preference of Peruvian plantcutter for C. crotonoides is less pronounced than for the other two species. Annual precipitation is a variable that is quite important in dry forest dynamics (Romo et al 2015), and temperature seasonality is closely related to areas where the species can maintain populations . Therefore, with the response curve can be evaluated the performance and interpretability of the models.…”

Section: Discussionmentioning

confidence: 99%

“…Nevertheless, an appropriate interpretation of our results requires some assumptions: 1) the ecological knowledge of study species must be sufficient to identify the sorts of interspecific relationships that may be explored as predictor variable. For this case, we used studies of distribution pattern and ecological relationships of Peruvian plantcutter (Flanagan et al 2009, Romo et al 2015. 2) In nature, many species may live in ensembles or associations -i.e.…”

Section: Discussionmentioning

confidence: 99%

“…First steps could focus on recovery of the lost habitat and reforesting with key plant species to improve the connectivity of dry forest and protected areas. Protected areas like Cerros de Amotape National Park, Huacrupe -La Calera Forest Regional Conservation Area, Moyan -Palacio Regional Conservation Area, Laquipampa Wildlife Refuge, and The Gramadal (Romo et al 2015) are the few areas with good conditions for stable populations of Peruvian plantcutters. We also recommended an intensive search for Peruvian plantcutters in protected areas like Cerros de Amotape National Park and Calipuy National Park, given that two parks have at least some sectors with apparently appropriate conditions for Peruvian plantcutter populations.…”

Section: Discussionmentioning

confidence: 99%

“…Occurrence records for P. raimondii were drawn from the literature (Parker et al 1995, Flanagan and Millen 2008, Flanagan et al 2009, Velásquez et al 2009, Romo et al 2015; each of these sites was visited by the authors to the confirmation of the presence of the species; these occurrence records had 10 m precision to the geographic coordinates, and we used only occurrence sites (53) that were confirmed in these new visits (Flanagan et al 2009, Romo et al 2015; we complemented these historicallybased occurrences with data obtained in our own field work in 2010-2016 (25); these new records were collected in the form of opportunistic sightings. Occurrence data were compiled and checked for duplicates; we removed points within 15 km of another point to avoid effects of spatial autocorrelation.…”

Section: Occurrence Datamentioning

confidence: 99%

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Species distribution models for Peruvian plantcutter improve with consideration of biotic interactions

Atauchi

Peterson

Flanagan³

2018

Journal of Avian Biology

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Biotic interactions have been controversial in distributional ecology, mainly in regards to whether they have effects over broad extents, with the negative view known as the Eltonian noise hypothesis (ENH). In this study, we evaluated the ENH for Phytotoma raimondii, a restricted‐range Peruvian endemic bird species: we developed models based on 1) only abiotic conditions, 2) only host plant distributions, and 3) both abiotic conditions and host plant distributions; models were evaluated with partial receiver operating characteristic test and Akaike information criteria metrics. We rejected the ENH for this case: biotic interactions improved the model. The frequency with which exceptions to the ENH are detected has important implications for distributional ecology and methods for estimating distributions of species.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Occurrence Datamentioning

confidence: 99%

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Species distribution models for Peruvian plantcutter improve with consideration of biotic interactions

Atauchi

Peterson

Flanagan³

2018

Journal of Avian Biology

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“…Despite such exceptions, G. boerhaaviaefolia shrubs and Prosopis spp. trees are present within the ranges of many, and probably most, subpopulations (Romo and Rosina 2012). Moreover, when these plants are present, Peruvian Plantcutters consistently select them (i.e., use more than proportionally available), foraging mainly on their leaves as well as their fruits and flowers (Liñ an and Nolazco 2013, Rivas 2015, Nolazco andS anchez 2018).…”

Section: Introductionmentioning

confidence: 99%

A single species of plant predicts territory occupancy in a population of Peruvian Plantcutters

Nolazco

Sánchez

2020

J. Field Ornithol.

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Habitat selection assessments at multiple spatial scales provide a more complete understanding of the habitat requirements of a species, a matter that is especially useful for managing endangered wildlife. Studies of the diet and population distribution of threatened Peruvian Plantcutters (Phytotoma raimondii) suggest that the presence of Prosopis spp. trees, and the shrubs Grabowskia boerhaaviaefolia and Scutia spicata could explain the scattered distribution of their remnant subpopulations. However, our overall understanding of this remains unclear and incomplete because plantcutters are often absent in areas dominated by Prosopis spp., and other species of plants have largely been overlooked in distribution models. One way to address this issue is to also investigate spatial distribution patterns at finer scales within subpopulations. We modeled the probability of territory occupancy at one of their last strongholds, the P omac Forest Historical Sanctuary in Peru. Our predictors were defined by biotic interactions using data collected in 2015 and 2016, and previous studies of their diet. We found that Peruvian Plantcutters consumed the leaves, fruits, and flowers of at least nine species of plants, but only G. boerhaaviaefolia shrubs, and the trees Prosopis spp. and Colicodendron scabridum were used more than expected based on availability. We did not observe consumption of S. spicata, but this plant was rare. Territory occupancy was positively influenced only by the availability of G. boerhaaviaefolia, a plant used by Peruvian Plantcutters both as a source of food and nest material. Our results suggest that, despite their diverse diet, Peruvian Plantcutters can be particularly dependent on the availability of G. boerhaaviaefolia. Accordingly, this may explain why both co-occur in most subpopulations. Lastly, although we found that Prosopis spp. did not explain territory occupancy, previous research shows that it does explain their distribution on a broader scale (across subpopulations). This inconsistency across spatial scales suggests a potential key role of Prosopis spp. in guaranteeing dispersal between and connectivity among subpopulations.

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Critical degradation of Peruvian Plantcutter Phytotoma raimondii habitat in Lobitos, Talara

Flanagan

2020

Rev peru biol

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The threatened Peruvian Plantcutter Phytotoma raimondii is a restricted-range species, endemic to the north coast of Peru. As a specialist herbivore, it is only found at sites with an adequate diversity of xerophytic flora. Although it is recognized that the species is under threat from habitat degradation and loss, little or no attempt has been made to measure these changes. This study catalogues the floral diversity and degradation of sites near Lobitos town, north of Talara, to determine the loss of this species´ habitat. Fieldwork was conducted between November 2019 and January 2020. All larger plants (with a diameter ≥ 5 cm near ground level) and all deforested Prosopis pallida (Algarrobo) stumps were georeferenced over a 10 ha plot at the main site of Cerro Blanco, c. 2 km south of Lobitos. The height, width and general health of each bush were noted, and the diameter of P. pallida stumps measured. Additionally, two smaller comparative plots, (0.3 and 0.75 ha) were surveyed c. 2.5 km to the north of Lobitos. Results point to an alarming and accelerated rate of degradation of this habitat type due to the deforestation and dieback of P. pallida: a key species in this habitat and important food source for the Plantcutter. Removal of P. pallida appears to affect the stability of sites, with other important species, e.g. Lycium boerhaviifolium (Palo Negro) dying off after logging. Without urgent remedial action, the Peruvian Plantcutter´s habitat will continue to become ever scarcer and more fragmented.

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Escasa presencia y grave amenaza para el “cortarramas peruano”, Phytotoma raimondii

Cited by 5 publications

References 5 publications

Species distribution models for Peruvian plantcutter improve with consideration of biotic interactions

Species distribution models for Peruvian plantcutter improve with consideration of biotic interactions

A single species of plant predicts territory occupancy in a population of Peruvian Plantcutters

Critical degradation of Peruvian Plantcutter Phytotoma raimondii habitat in Lobitos, Talara

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