The Original Scientific Description of the Lone Star Tick (Amblyomma americanum, Acari: Ixodidae) and Implications for the Species’ Past and Future Geographic Distributions

Amblyomma americanum L. is an important vector in North America originally described by Linnaeus based on Pehr Kalm’s 1754 report. While Kalm’s ‘Travels into North America’ is well known, his 1754 report remains obscure. Some authors were skeptical that Kalm referred to A. americanum because he encountered them at sites farther north outside of the species’ range. However, the details in 1754 report leave no doubt that Kalm described lone star ticks. In this historical review, we provide support for Kalm’s identification using a modern translation of his 1754 report and other sources. We also delineate distributional changes of lone star ticks from the pre-colonization era to the present and interpret them in the context of large-scale anthropogenic changes in the landscape. In this framework, the lone star tick’s current northward expansion is a recolonization of their former range. Extensive deforestation and extirpation of their principal host species, white-tailed deer, led to A. americanum’s disappearance from the northern parts of its range by the 20th century. Subsequent recolonization by second-growth forest and increases in white-tailed deer populations by the mid-20th century is now allowing A. americanum to reclaim its former range. These changes in the land appear to be the driving force behind A. americanum’s present expansion. Understanding this species’ history and the factors contributing to its current expansion will enable better predictions about its future distribution and potential to transmit human pathogens.

Diet of the southern ravine salamander Plethodon richmondi

The diets of many small North American Plethodon species are poorly studied despite their important roles in forest ecosystems. Using a non lethal gastric lavage method, we examined the spring-season diet of 31 southern ravine salamanders (Plethodon richmondi) from a second-growth forest in south-eastern Kentucky (USA). We recovered and identified a total of 452 prey items from 14 different prey groups. The three most important prey groups were Formicidae (ants), Acari (mites and ticks), and Collembola (springtails). Together, these groups accounted for more than 80 % of all prey items. Examining the diets of terrestrial salamanders may help us better understand their roles in the regulation of invertebrate communities and the transfer of accessible nutrients back to the soil.

Strengthening Local Governance of Secondary Forest in Peru

Natural forest regrowth is critical for restoring ecosystem services in degraded landscapes and providing forest resources. Those who control tenure and access rights to these secondary forest areas determine who benefits from economically charged off-farm opportunities such as finance for forest restoration, selling carbon credits, and receiving payment for ecosystem services. We explore multiple dimensions of secondary forest governance in Peru, where the lack of official government statistics of the extent, geography, and ownership, coupled with low state capacity, prevents the development of governance structures that could stimulate their sustainable management. In this paper, we review the challenges to secondary forest governance, and the opportunities to strengthen it, focusing on beneficial outcomes for smallholder farmers. We characterize secondary forest types, extent, and persistence in Peru, followed by a presentation of the social dimensions of their governance. We identify four entry points for government to take action: national mapping of the socio-geography of second growth forest, regularize the property rights of untitled landholders, relax forest regulations, and provide incentives, not sanctions, for secondary forest management. Overall, we recommend folding secondary forest governance into a landscape approach. In Peru, strengthening local forest governance could help to drive benefits of climate change mitigation incentives directly to local forest stewards.

The University of West Florida Campus Ecosystem Study: Age-Diameter and Growth Relationships of Longleaf Pine Using Hurricane-Induced Windthrows

The campus of the University of West Florida was constructed among second-growth longleaf pine (Pinus palustris) stands that survived extensive logging in the Florida Panhandle. Previous studies on longleaf pine on the main UWF campus have estimated that 65% of these pines are 75 to 125 years old, with estimates based on a model from old-growth longleaf in southern Georgia. To obtain more accurate age data, one can use an increment corer to collect samples from live trees on site; more accurately, disks can be collected from recently fallen trees. On 16 September 2020, Hurricane Sally impacted UWF as a Category 2 storm, with winds reaching 125 kph. Our study took advantage of longleaf pines blowdowns by Sally to obtain cross-sections for age determinations. Two on-campus natural areas were chosen for sampling: the Edward Ball Nature Trail and the Baars-Firestone Wildlife Sanctuary. For each sampled section, diameter at breast height (DBH) and number of annual rings were recorded. Based on a total of 50 sampled trees, linear regression revealed a highly significant (P<0.00001; r2 =0.84) relationship between DBH and age. Applying this to DBH measures of 2,165 stems on the main campus indicates that the oldest longleaf pines are ~130 years old (mean age = 63.9±0.4 yr), consistent with cessation of historically wide-spread harvesting in the region. Mean age for the Trails site (55.7±1.6 yr) was significantly lower than that of the Sanctuary (66.7±2.0 yr), suggesting that they represented sites of contrasting land-use history. Direction of stem windthrows did not vary between natural areas and was consistent with characteristics of the eyewall of Hurricane Sally with strongest wind gusts moving from a southeast to northwest direction.