What strategies are effective for perpetuating structures provided by old trees in harvested forests? A case study on trees with hollows in south-eastern Australia

Gibbons, Philip; McElhinny, Chris; Lindenmayer, David B.

doi:10.1016/j.foreco.2010.06.016

Cited by 41 publications

(43 citation statements)

References 33 publications

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“…Our results provide further evidence that urban landscapes face a concerning future of large old tree decline, which is comparable with other highly impacted landscapes, including agricultural land [12], [57] and production forests [15], [52]. We argue that predicted declines in hollow-bearing trees in urban greenspace (Fig.…”

Section: Discussionsupporting

confidence: 78%

The Future of Large Old Trees in Urban Landscapes

et al. 2014

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Large old trees are disproportionate providers of structural elements (e.g. hollows, coarse woody debris), which are crucial habitat resources for many species. The decline of large old trees in modified landscapes is of global conservation concern. Once large old trees are removed, they are difficult to replace in the short term due to typically prolonged time periods needed for trees to mature (i.e. centuries). Few studies have investigated the decline of large old trees in urban landscapes. Using a simulation model, we predicted the future availability of native hollow-bearing trees (a surrogate for large old trees) in an expanding city in southeastern Australia. In urban greenspace, we predicted that the number of hollow-bearing trees is likely to decline by 87% over 300 years under existing management practices. Under a worst case scenario, hollow-bearing trees may be completely lost within 115 years. Conversely, we predicted that the number of hollow-bearing trees will likely remain stable in semi-natural nature reserves. Sensitivity analysis revealed that the number of hollow-bearing trees perpetuated in urban greenspace over the long term is most sensitive to the: (1) maximum standing life of trees; (2) number of regenerating seedlings ha−1; and (3) rate of hollow formation. We tested the efficacy of alternative urban management strategies and found that the only way to arrest the decline of large old trees requires a collective management strategy that ensures: (1) trees remain standing for at least 40% longer than currently tolerated lifespans; (2) the number of seedlings established is increased by at least 60%; and (3) the formation of habitat structures provided by large old trees is accelerated by at least 30% (e.g. artificial structures) to compensate for short term deficits in habitat resources. Immediate implementation of these recommendations is needed to avert long term risk to urban biodiversity.

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Section: Discussionsupporting

confidence: 78%

The Future of Large Old Trees in Urban Landscapes

et al. 2014

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“…younger) trees and therefore reduces the number of trees of a suitable size and age for hollow formation (Lindenmayer et al, 2012;Lindenmayer et al, 2014). Such losses are additional to those that result from the natural collapse of existing hollow trees (Gibbons et al, 2010;Lindenmayer et al, 2012). Current logging practices in Australia require the reservation of hollow-bearing trees (HBT) and future recruitment trees during logging.…”

Section: Introductionmentioning

confidence: 99%

Tree hollows and forest stand structure in Australian warm temperate Eucalyptus forests are adversely affected by logging more than wildfire

McLean

Bradstock

Price

et al. 2015

Forest Ecology and Management

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“…Sin embargo, la eficacia de medida es cuestionada por algunos autores, al temer que dichas cajas provoquen un efecto atrayente sobre especies oportunistas y abundantes, en detrimento de otras más escasas y exigentes (Boye & Dietz 2005), por lo que se recomienda dirigir esta actuación a zonas con déficit de refugios naturales. En cualquier caso, las cajas pueden paliar la escasez o insuficiencia de refugios naturales en determinadas áreas, debido a una gestión forestal presente o pasada, pero no deben sustituir la necesaria presencia de árboles con oquedades naturales (Mitchell-Jones & McLeish 2004), que debe ser una prioridad de una gestión forestal sostenible (Gibbons et al 2010). Aunque las cajas colocadas en Navarra se encuentran principalmente en espacios protegidos, han sido instaladas mayoritariamente en bosques sometidos a explotación forestal y por tanto con escasez de refugios naturales.…”

Section: Discussionunclassified

Ocupación de cajas-refugio por murciélagos en Navarra

2013

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What strategies are effective for perpetuating structures provided by old trees in harvested forests? A case study on trees with hollows in south-eastern Australia

Cited by 41 publications

References 33 publications

The Future of Large Old Trees in Urban Landscapes

The Future of Large Old Trees in Urban Landscapes

Tree hollows and forest stand structure in Australian warm temperate Eucalyptus forests are adversely affected by logging more than wildfire

Ocupación de cajas-refugio por murciélagos en Navarra

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