Ecological stress memory in wood architecture of two Neotropical hickory species from central-eastern Mexico

Drought periods are major evolutionary triggers of wood anatomical adaptive variation in Lower Tropical Montane Cloud Forests tree species. We tested the influence of historical drought events on the effects of ecological stress memory on latewood width and xylem vessel traits (vessel density, vessel grouping index, hydraulic diameter, and percent conductive area) in two relict hickory species (Carya palmeri and Carya myristiciformis) from central-eastern Mexico. We hypothesized that latewood width would decrease during historical drought years, developing correlations between growth and hydric stress conditions, and that during past tree growth, moisture stress would imprint on wood anatomical traits between successive drought events. We analyzed latewood anatomical traits that developed during historical drought and pre- and post-drought years in both hickory species. We found that repeated periods of hydric stress left climatic signatures for annual latewood growth and xylem vessel t..., The Ring-Width Index (RWI), earlywood-width (EWw) and latewood-width (LWw) of hickory species were measured separately to obtain intra-annual climate signals from the tree-ring parameters by the presence of distinct narrow to wide earlywood conduits in a single intermittent row, and medium to narrow solitary and radial multiples of latewood conduits from two to three (https://www.wood-database.com) were used as phenological indicators to determine the EWw and LWw boundaries. Growth rings (EWw and LWw) were measured under a stereoscopic microscope (Olympus SZ61, Olympus Corporation, Center Valley, PA, USA) and with a Velmex Tree Ring Measuring System (Velmex, Bloomfield, NY, USA) with 0.001 mm accuracy using TSAP-Win v. 4.67c. The ring-width time series were visually and statistically cross-dated using the software TSAP-Win and COFECHA. To obtain the average of the detrended RWIs, EWw, and LWw, we standardized the raw ring-width series using the ARSTAN program to remove non-climatic tren..., , # Ecological stress memory in wood architecture of two Neotropical hickory species from central-eastern Mexico

[https://doi.org/10.5061/dryad.83bk3jb13](https://doi.org/10.5061/dryad.83bk3jb13)

Carya species database:

Description of the Data and file structure

We have attached the information on the database used and the dendrochronology analyses performed to obtain the results in the manuscript. Also attached are the statistical programs and software that users can use to obtain the information.

1\) Tree ring width measurement was performed using the free software COFECHA and the TSAP-Win v.4.67c

2\) We performed statistical analyses using the software R.

Sharing/access Information

Links to other publicly accessible locations of the data:

COFECHA ([https://www.ltrr.arizona.edu/pub/dpl/A-INFO.HTM).-](https://www.ltrr.arizona.edu/pub/dpl/A-INFO.HTM\).-) Dating and measurement tree-ring quality control.

TSAP-Win ([https://rinntech.info/products/tsap-win/).-](https://rinntech.inf...