Late Holocene environmental change in Lake Boquete and its watershed: human or natural causes?

Temoltzin-Loranca, Yunuén; Vélez, María Isabel Álvarez; Moreno, Enrique; Escobar, Jaime

doi:10.18268/bsgm2018v70n1a7

Cited by 2 publications

(1 citation statement)

References 25 publications

(29 reference statements)

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“…Publications describing freshwater diatoms from Central America are scarce. If few paleolimnological studies based on diatoms have been conducted in Costa Rica (e.g., Chávez & Haberyan 1996;Haberyan & Horn 1999, 2005, Nicaragua (e.g., Slate et al 2013) and Panama (e.g., Temoltzin-Loranca et al 2018), even fewer have been conducted in the Yucatan Peninsula, and these are generally limited to the Holocene (Whitmore et al 1996;Rosenmeier et al 2004). Longer diatom records originated from the Mexico Basin (Bradbury 2000;Ortega et al 2010).…”

Section: Introductionmentioning

confidence: 99%

New fossil genus and new extant species of diatoms (Stephanodiscaceae, Bacillariophyceae) from Pleistocene sediments in the Neotropics (Guatemala, Central America): adaptation to a changing environment?

Paillès

Sylvestre

Tonetto

et al. 2020

EJT

759

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Several taxa of Stephanodiscaceae were found in the upper section of Pleistocene sediments from Lake Petén-Itzá (Guatemala). A new fossil genus Cyclocostis Paillès gen. nov. and new extant species Discostella gabinii Paillès & Sylvestre sp. nov. are described. Cyclocostis gen. nov. is characterized by a strongly tangentially undulated valve surface, coarse unequal striation reaching a central punctum in the valve center, an absence of central lamina and domed criba, widely open alveoli with one median recessed costa bearing marginal fultoportulae and a single rimoportula all within a ring. A single valve face fultoportula is present on the raised part of the valve opposite the rimoportula. Differences relative to similar genera and the delimitation of a new genus are discussed. Discostella gabinii sp. nov. is distinguished by circular and flat valves, a small central area bearing 5 to > 30 scattered large areolae giving a colliculate appearance, medium-sized alveoli, marginal fultoportulae on every 4–5th costa, a single rimoportula and internally smooth valve center. Differences to similar taxa in the genus Discostella are discussed. The succession of the species of Cyclotella, Discostella and Cyclocostis gen. nov. in our record could represent eco-phenotypic responses to particular environmental stress / change.

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Section: Introductionmentioning

confidence: 99%

New fossil genus and new extant species of diatoms (Stephanodiscaceae, Bacillariophyceae) from Pleistocene sediments in the Neotropics (Guatemala, Central America): adaptation to a changing environment?

Paillès

Sylvestre

Tonetto

et al. 2020

EJT

759

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Reconstructing the “push” and “pull” of climate and its impacts on subsistence cultures using paleolimnology

Covert

Medeiros

2021

FACETS

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Climate variability has influenced settlement and cultural activities of human populations for millennia, and our knowledge of the context of environmental drivers of migration can be inferred using paleolimnological techniques. We present a systematic map of literature to understand the breadth of paleolimnological research that exists on environmental change and its impact on subsistence cultures. We aim to illustrate how the “push” and “pull” of climate influenced human society over the late-Holocene. A systematic search found 68 unique relevant studies that discussed topics of human settlement and migration, stressors on the environment, and (or) ecological monitoring with respect to changes in climate using paleolimnological methods. We identified three primary themes: where people live, how people live, and how people will continue to live. Most studies took place in North America, within the last decade, and had a focus on diatoms, sediment characteristics, and climate. Topics ranged from reconstructions of changes in climate, human presence, human influence on the environment, subsistence strategies, and the importance of monitoring. We demonstrate the value of paleolimnological methods in understanding the timing of events, revealing long-term ecological trends, and providing baseline conditions for effective remediation and management purposes.

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Late Holocene environmental change in Lake Boquete and its watershed: human or natural causes?

Cited by 2 publications

References 25 publications

New fossil genus and new extant species of diatoms (Stephanodiscaceae, Bacillariophyceae) from Pleistocene sediments in the Neotropics (Guatemala, Central America): adaptation to a changing environment?

New fossil genus and new extant species of diatoms (Stephanodiscaceae, Bacillariophyceae) from Pleistocene sediments in the Neotropics (Guatemala, Central America): adaptation to a changing environment?

Reconstructing the “push” and “pull” of climate and its impacts on subsistence cultures using paleolimnology

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